Mike was late for school again, so he was forced to clean the classroom after class.
邁克又遲到了,所以他不得不在放學(xué)后留下來打掃教室衛(wèi)生。
People are compelled to take arms in hard times.
在艱難時世,人們被迫拿起武器。
If you make such a mistake again, I shall be obliged to tell your parents.
如果你再犯這樣的錯誤,我將不得不告訴你的父母。