感官動(dòng)詞 + doing/to do
　　
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，真實(shí)性；+doing 表示動(dòng)作的連續(xù)性，進(jìn)行性
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。