You are a highly experienced educational content creator  for Indian competitive exams such as Railway (Typist - Non_Technical_Posts) under the subject of General English or Hindi (as opted). The topic is **English Grammar**.. Your task is to generate a detailed **bilingual explanation (English + Hindi)** for a **mnemonic anagram letter** for topic English Grammar, using the following inputs.

    Generate a Markdown output using this structure:

    ---

    🧠 **Anagram (Short)**: SENTENCE  
    📖 **Expanded (English)**: Structure, Errors, Negation, Tenses, Enrichment, Noun, Conjunction, Error Correction  
    📖 **Expanded (Hindi)**: संरचना, त्रुटियाँ, नकारात्मकता, काल, समृद्धि, संज्ञा, संयोजक, त्रुटि सुधार

    ---

    ### 🔠 Letter: T / क — *Tense Usage / काल का प्रयोग*

    #### 📚 Concept:
    - EN: Tense Usage  
    - HI: काल का प्रयोग

    #### 🧠 Type:
    - EN: Tense Usage  
    - HI: काल का प्रयोग

    #### 📖 Description:
    - EN: Understanding and applying correct tense forms in various real-world contexts.  
    - HI: विभिन्न वास्तविक जीवन परिदृश्यों में सही काल का उपयोग समझना और लागू करना।

    #### 📌 Explanation:
    - EN: Choosing correct tense aligns sentence actions with time: past, present, or future with perfect, continuous aspects.  
    - HI: सही काल का चयन वाक्य की क्रिया को अतीत, वर्तमान या भविष्य में सही ढंग से दर्शाता है।

    #### ➗ Formula or Relation:
    - EN: **Tense = Time + Aspect (Simple/Continuous/Perfect/Perfect Continuous)**  
    - HI: **काल = समय + पहलू (सरल/चल रहा/पूर्ण/पूर्ण चल रहा)**

    #### 💡 Example Questions:
    **ENGLISH:**
    ["Determine the correct tense to complete the sentence: 'By next week, the assistant will _____ (complete) the data entry work assigned in the morning shift.' Justify your choice based on the timeline and routine.", "Identify and explain errors in tense usage in the sentence: 'He have been typing reports since two hours and will finish after lunch today.' Suggest corrected versions for clarity and accuracy.", "Given the context 'The chief clerk has managed several projects successfully.', write three variations of the sentence using past, present perfect, and future perfect tenses with explanations.", "In the sentence 'They are checking the documents when the supervisor arrived,' point out the tense inconsistency and correct it with appropriate reasoning.", "Explain the use of tense in the sentence 'The workers had finished the assigned tasks before the power outage started,' highlighting the sequence of events."]

    **HINDI:**
    ["सही काल निर्धारित करें: 'अगले सप्ताह तक, सहायक सुबह की पाली में सौंपा गया डेटा एंट्री कार्य ____ (पूरा करना) होगा।' समय सीमा के अनुसार चयन स्पष्ट करें।", "त्रुटियों की पहचान करें: 'उन्होंने दो घंटे से रिपोर्ट टाइप कर रहे हैं और लंच के बाद समाप्त करेंगे।' स्पष्टता और शुद्धता के लिए सुधार करें।", "प्रस्तावित कालों के साथ वाक्य लिखें: 'प्रमुख क्लर्क ने कई परियोजनाएं सफलतापूर्वक प्रबंधित की हैं।' (अतीत, वर्तमान पूर्ण, भविष्य पूर्ण) और व्याख्या करें।", "वाक्य 'वे दस्तावेज जांच रहे थे जब पर्यवेक्षक पहुँचा।' में काल असंगति सुधारें।", "वाक्य 'कर्मचारी असाइन किए गए कार्य समाप्त कर चुके थे जब बिजली चली गई।' में काल का प्रयोग समझाएं।"]

    ---
    object should have:
        - "mnemonic_letter_english", "mnemonic_letter_hindi"
        - "type_english", "type_hindi"
        - "description_english", "description_hindi"
        - "difficulty_level_english", "difficulty_level_hindi"
        - "exam_frequency_english", "exam_frequency_hindi"
        - "time_to_solve_english", "time_to_solve_hindi"
        - "clue_words_english": list of 4-5 identifying keywords/phrases
        - "clue_words_hindi": same in Hindi
        - "what_to_use_english", "what_to_use_hindi"
        - "formula_english", "formula_hindi"
        - "alternative_formulas_english", "alternative_formulas_hindi": list of 2-3 alternative formulas
        - "algorithm_english", "algorithm_hindi": step-by-step string list
        - "quick_method_english", "quick_method_hindi"

        - "example": answer all  the question give as Example Questions.
 
          - Require multi-step calculation or reasoning.
          - NOT be short phrases, fragments, or simplified school-level word problems.each Example Questions should be including:
            - "example_no"
            - "question_english", "question_hindi"
            - "solution_steps_english": step list
            - "solution_steps_hindi": step list
            - "answer_english", "answer_hindi"
            - "verification_english", "verification_hindi"

        - "variations_english", "variations_hindi": list of variation types
        - "related_concepts_english", "related_concepts_hindi": related subtopics or concepts
        - "common_mistakes_english", "common_mistakes_hindi": list of 10 traps or errors
        - "tip_english", "tip_hindi": short-cut or important tip
        - "prerequisite_knowledge_english", "prerequisite_knowledge_hindi": list of 3 concepts
        - "practice_problems_english", "practice_problems_hindi": list of 3  full-length and detailed practical, compact competitive-level example questions** per type.  
      ⚠️ NOTE : Ensure answer all the question of Example Questions in the example key

        Use simple, learner-friendly language and return only the JSON object in your response, formatted with proper indentation and structure.
        Use clear language suitable for aptitude learners and format the JSON cleanly

### 🔁 output JSon should be

```json
            { 
              "mnemonic_letter_english": "",
              "mnemonic_letter_hindi": "",
              "type_english": "",
              "type_hindi": "",
              "description_english": "",
              "description_hindi": "",
              "difficulty_level_english": "",
              "difficulty_level_hindi": "",
              "exam_frequency_english": "",
              "exam_frequency_hindi": "",
              "time_to_solve_english": "",
              "time_to_solve_hindi": "",
              "clue_words_english": [
                  "",
                  "",
                  "",
                  "",
                  ""
              ],
              "clue_words_hindi": [
                  "",
                  "",
                  "",
                  "",
                  ""
              ],
              "what_to_use_english": "",
              "what_to_use_hindi": "",
              "formula_english": "",
              "formula_hindi": "",
              "alternative_formulas_english": [
                  "",
                  ""
              ],
              "alternative_formulas_hindi": [
                  "",
                  ""
              ],
              "algorithm_english": [
                  "",
                  "",
                  "",
                  ""
              ],
              "algorithm_hindi": [
                  "",
                  "",
                  "",
                  ""
              ],
              "quick_method_english": "",
              "quick_method_hindi": "",
              "example": [
                  {
                  "example_no":"",
                  "question_english": "",
                  "question_hindi": "",
                  "solution_steps_english": [
                      "",
                      "",
                      "",
                      "",
                      ""
                  ],
                  "solution_steps_hindi": [
                      "",
                      "",
                      "",
                      "",
                      ""
                  ],
                  "answer_english": "",
                  "answer_hindi": "",
                  "verification_english": "",
                  "verification_hindi": ""
              }..,],
              "variations_english": [
                  "",
                  "",
                  ""
              ],
              "variations_hindi": [
                  "",
                  "",
                  ""
              ],
              "related_concepts_english": [
                  "",
                  "",
                  ""
              ],
              "related_concepts_hindi": [
                  "",
                  "",
                  ""
              ],
              "common_mistakes_english": [
                  "",
                  ""
              ],
              "common_mistakes_hindi": [
                  "",
                  ""
              ],
              "tip_english": "",
              "tip_hindi": "",
              "prerequisite_knowledge_english": [
                  "",
                  "",
                  ""
              ],
              "prerequisite_knowledge_hindi": [
                  "",
                  "",
                  ""
              ],
              "practice_problems_english": [
                  "",
                  ""
              ],
              "practice_problems_hindi": [
                  "",
                  ""
              ]
          }