Grammar Focus 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。本单元主要学习其作宾语，状语，宾补的用法。(一)动词不定式 一. 作宾语 动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin, want, remember, agree, learn, like, decide, fail, pretend, demand, refuse等。例：I want to tell you a story. They begin to work at eight every morning. Don’t forget to lock the door. Would you like to go and have a picnic with us tomorrow? 二. 作宾语补足语。例如：The teacher asked us to read English for half an hour in the morning.The teacher often tells Jim not to spend too much time playing computer games.?Please let me help you.?动词不定式作宾语补足语，表示宾语所做的动作，可以用动词不定式作宾语补足语的动词有：tell, ask, want, like, invite, encourage, help等。但在let, make, see, watch, hear, feel, notice, have等感官听觉动词或使役动词后面作宾语补足语的动词不定式一般要省略动词不定式符号“to”，可以归纳为以下三种句式：1.不可以省to的不定式作宾语补足语： tell /ask / want / would like / wish / suppose / invite /encourage /teach/ depend on等 + sb.+ to do sth. ? 例：??The teacher told us to come earlier tomorrow.?? I want you to go now.?? Her parents wish her to be a teacher.? ? 2.省“to”的不定 |
