更新時間:2022-02-14 09:32:09 來源:大牛教育成考網 點擊量:
動詞不定式的用法
不定式結構作主語
1、不定式前置
1) Derive [A] mineral resources from [B] sedimentary rock [C] is a [D] major modern industrial activity.
2) in the matriculation for postgraduate in a short time is realy a hard nut.
[A] To make high scores[B] To make low goal[C] To the high scores[D] Make the low goals
2、上述形式一般情況不多見,作為考試的規范英語,如果不定式較長,顯得頭重腳輕,則可由代詞“it”作形式主語(形式主語“it”不能由“that”或“this”等其他代詞代替),而將不定式放到后面
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It is really a hard nut to get high scores in the matriculation for postgraduate in a short time.
3) John admitted that it's always difficult.
[A] for him being on time[B] being on time for him
[C] for him to be on time[D] on time for him
4) It is difficult for me [A] to be concentrating [B] while someone [C] is using [D] a vacuum cleaner.
3、不定式后置的情況不僅限于動詞是系動詞,也適用于其他動詞
It took us a great deal of efforts to finish that task.
It made him extremely happy to get contact with his family in Taiwan since they separated more than 40 years ago.
4、不定式結構所表示的動作是誰做的,即不定式的邏輯主語,通??梢栽谔囟ǖ纳舷挛闹心芸闯?,也可以通過帶“for +名詞短語”辨出
It is quite important for us to read good books during the period of general review(總復習)。
It is not difficult for those who study maths well to pass the exam.
5、在某些形容詞(如careless,clever,considerate,foolish,good,impolite,kind,naughty,nice,silly,stupid等)作表語時,不定式后可以加of來引導出其邏輯主語
It is very kind of you to help me./It is stupid of him to do such a silly thing.
間或也可用for + there to be 表示(而且there后面的不定式只能是to be)。
It's a great pity for there to be much trouble in the company.
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