英语语法大全-特殊词精讲6

       8.11 begin(start) doing/to do
        
        　begin / start to do sth
        　begin / start doing sth.
       
        1)　谈及一项长期活动或开始一种习惯时，使用doing.
        　 How old were you when you first started playing the piano?
        　 你几岁时开始弹钢琴？
        2)　begin, start用进行时时，后面动词用不定式to do
        　　I was beginning to get angry。
        　　我开始生起气来。
        3)　在attempt, intend, begin, start 后接know, understand, realize这类动词时，常用不定式to do。
        　　I begin to understand the truth。
        　　我开始明白真相。
        4)　物作主语时
        　　It began to melt.
        8.12 感官动词 + doing/to do
        
        　　感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do　 表示动作的完整性，真实性；+doing 表示动作的连续性，进行性
        　
        　I saw him work in the garden yesterday.
        　昨天我看见他在花园里干活了。(强调"我看见了"这个事实)
        　I saw him working in the garden yesterday.（强调"我见他正干活"这个动作）
        　昨天我见他正在花园里干活。
       
        典型例题
        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。因题意为，他们看着她长大，因此强调的是成长的过程，而非正在长的动作，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. 本题强调其动作，正在河边玩，应此用see sb. doing sth句型。