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二、不省“to”的情况 (1)在used to \be going to \mean to \ought to \plan to\try to\would like to \would love to \hope to \want to下列句子中,to 通常都得留 Eg:He doesn’t get up early ,but he used to –can you work out this maths problem ? --I’ll try to (2)在 be +adj (如:glad, happy, pleased, anxious, willing, ready)等 此后保留to Eg:---Would you like to join us in the game? --- I’d love to 3.在ask, advise, allow, permit, persuade, tell, wish 等词的复合结构 中to通常保留 Eg:Do the experiment as your teacher tells you to 4.不定式的否定形式后保留to Eg:He wanted to quiz school and I advised him not to 注:to 后若是主动词have 或 be时,必须保留。 Eg:---Sorry, I didn’t finished doing my home work. ---You ought to have Our school is no longer what it used to be Wh-+to do 结构 1 作主语When to start \How to go there \Where to go \Who to do it has not been decided . 2 宾语。在discover ,find out ,know ,see ,show ,understand 等动词后, 不直接用不定式作宾语,必须用wh--+to 结构 ,在下列词中也带这 种结构, decide ,learn ,remember ,forget ,wonder I don’t know when to start who to do it \how to do it\ where to go \whether to do it 3表语 The problem is when to start it \who to do it \how to go there \where to go 4 状语。She was at a loss (as to )what to do 她不知如何是好 5 同位语: I have no idea which one to take 我不知道该拿哪个 注:why (not) do … * 河工 不定式、动名词用作主语 动名词作主语 1。直接作主语: (1)眼见为实。 (2)天天做早操有益于健康。 (3)吸烟不是好习惯。 1.Seeing is believing. 2.Doing morning exercises every day is good for health 3.Smoking is not a good habit 2.用it作形式主语,常与no use,no good,useless, worthwhile连用 (1)广说不做没用 (2)做无益的后悔没用 (3)吸烟太多无益 (4)学好英语是值得做的 1.It’s no use talking too much without doing anything 2.It’s useless crying over the spilt milk. 3.It’s no good smoking too much 4.It’s worthwhile learning English well.5 不定式作主语 1。直接作主语 (1)眼见为实 (2)今天早晨做早操对身体无益 (3)在这里吸烟很危险 1.To see is to believe 2.To do morning exercises today is not good for health. 3.To smoke here is dangerous 2。用it作形式主语,有自己特定的句型 (1)你这么说真是太好了 (2)他说出这样的话太愚蠢了 (3)我们学好英语是必要的 (4)你们学好英语语法并不难 1.It is very kind of you to say so. 2.It’s very foolish of him to say such thin
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