［特殊詞精講］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，+doing 表示動作的進行性。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，應此用see sb. doing sth句型。