Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Possible Duplicate: 'Did it close' vs 'Has it closed'? As a English non-native speaker it is difficult for me to understand when I must use present perfect or past simple because in my official language there isn't the present perfect tense. I know that present perfect is related to something that happened in the past but its result is important now. But for instance: The message has been sent. The message was sent. Please help me point me out any examples/contexts where I should use 1. instead of 2.
1 means that the action happened just now. You would typically see it in your e-mail program just after you send an e-mail. Your program might give you this message to let you know that the message you just sent has indeed been sent. 2 refers to something that happened at some time in the past. It could have been an hour ago, a day ago, or even a century ago! But it wasn't just now.

Does English use the word thou in situations nowadays? For example, to humiliate an opponent by being overly familiar?.
The Only thing I can think of is if a suitor were being extremely formal in a proposal of marriage: Wouldst thou do me the honor.... It might also be used in a light teasing manner, pretending to be formal. For instance, asking someone to dance. Pretty much all personal instances I can think of using thou have been teasing or joking. Example, shouting 'Thou hast brought dishonor upon this family!' at your brother for spilling the orange juice.

I was told in a Latin class that the name Christopher has Greek roots that mean 'one who carries Christ'. I assume that the Latin connection here is fero, which is the verb to carry. With that in mind, does the name Jennifer have a similar derivation? If so what would she be carrying?.

No Jennifer is from From a Cornish form of the Welsh name Gwenhwyfar (see GUINEVERE). This name has only been common outside of Cornwall since the beginning of the 20th century, after it was featured in George Bernard Shaw's play 'The Doctor's Dilemma' (1906). GUINEVERE From the Norman French form of the Welsh name Gwenhwyfar, composed of the elements gwen meaning 'fair, white' and hwyfar meaning 'smooth'. In Arthurian legend she was the beautiful wife of King Arthur who engaged in an adulterous affair with Sir Lancelot. Her betrayal of her husband with Mordred prompted the battle of Camlann, which led to the deaths of both Mordred and Arthur. The Cornish form of this name, Jennifer, has become popular in the English-speaking world.