感官動(dòng)詞 see， watch， observe， notice， look at， hear， listen to， smell， taste， feel + do表示動(dòng)作的完整性，+doing 表示動(dòng)作的進(jìn)行性。例如：

I saw him work in the garden yesterday. 昨天我看見他在花園里干活了。（強(qiáng)調(diào)"我看見了"這個(gè)事實(shí)）

I saw him working in the garden yesterday.（強(qiáng)調(diào)"我見他正干活"這個(gè)動(dòng)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(qiáng)調(diào)的是成長的過程，而非正在長的動(dòng)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(qiáng)調(diào)其動(dòng)作，正在河邊玩，應(yīng)此用see sb. doing sth句型。