TASK DEFINITION: In this task you are given a sentence. You must judge whether the main verb of the sentence is in present or past tense. Label the instances as "Present" or "Past" based on your judgment. If there is no verb in the given text, answer "Present".
PROBLEM: Jeff stiffened, then shook his head vigorously.

SOLUTION: Past

PROBLEM: He freezes, his forehead creasing.

SOLUTION: Present

PROBLEM: " Bell " he announced.

SOLUTION:
Past