Question

why are you still here?i still need one more hour

-Lily，why are you still here？School is over for half an hour．
--Because I ______ my task yet．I still need one more hour．（　　）

A. won't finish

B. didn't finish

C. haven't finished

D. hadn't finished

Answer 1

根据I still need one more hour．可知再需要一小时，表示现在还没有完成，还有特别注意yet这个标志词，经常和现在完成时一起连用，故用现在完成时的否定式，主语是I，所以助动词用have，否定式在后面直接加not，缩写为haven't，加上finish的过去分词finished，故选C．