8.12 感官動詞 + doing/to do
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  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 playing  C. play  D. to play
 答案A. 本題強調(diào)其動作,正在河邊玩,應(yīng)此用see sb. doing sth句型。