用所給單詞的適當形式填空。Thank you for helping us.We finished___________(do)it on time.請說明，謝謝。

熱心網友

doing ,finish doing sth 是一種固定的語法,不論是過去式還是現在進行時通通都是ing形式的

熱心網友

Thank you for helping us.We finished__doing___(do)it on time.

熱心網友

having done這題好象做過,不過答案我忘了~印象中不是doing強調是過去,已做完,所以用having done

熱心網友

doing

熱心網友

doingfinish+ ing 是定式Thank you for helping us.We finished doing it on time