regret doing/to do

　　regret to do　對要做的事遺憾�！�(未做)

　　regret doing　對做過的事遺憾、后悔�！�(已做)

　　I regret to have to do this, but I have no choice.

　　我很遺憾必須這樣去做，我實在沒有辦法。

　　I don't regret telling her what I thought.

　　我不為告訴她我的想法而后悔。

　　典型例題

　　You were brave enough to raise objections at the meeting.

　　Well, now I regret ___ that.

　　A. to do　B. to be doing　C.　to have done　D.　having done

　　答案：D.regret having done sth. 對已發(fā)生的事感到遺憾。regret to do sth. 對將要做的事感到遺憾。本題為對已說的話感到后悔，因此選D.

　　感官動詞 + doing/to do

　　感官動詞 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do 表示動作的完整性，真實性;+doing 表示動作的連續(xù)性，進行性

　　I saw him work in the garden yesterday.

　　昨天我看見他在花園里干活了。(強調(diào)"我看見了"這個事實)

　　I saw him working in the garden yesterday.(強調(diào)"我見他正干活"這個動作)

　　昨天我見他正在花園里干活。

　　典型例題

　　1)They knew her very well. They had seen her ___ up from childhood.

　　A. grow B. grew C. was growing D. to grow

　　答案：A.因題意為，他們看著她長大，因此強調(diào)的是成長的過程，而非正在長的動作，因此用see sb do sth 的句型。

　　2)The missing boy was last seen ___ near the river.

　　A. playing B. to be playingC. playD. to play

　　答案A. 本題強調(diào)其動作，正在河邊玩，應此用see sb. doing sth句型。