2017年6月英語四級語法知識點(diǎn)：不定式

※2017年6月英語四六級考試太難？只是你沒有找對方法而已！點(diǎn)擊查看秘籍！
    【手機(jī)用戶】→點(diǎn)擊進(jìn)入免費(fèi)試聽>>【CET4】 * 【CET6】
    【電腦用戶】→點(diǎn)擊進(jìn)入免費(fèi)試聽>>四六級考試課程！
    一、不定式的常考形式
    1) 一般形式：
    He decided to work harder in order to catch up with the others.
    被動(dòng)形式：
    He preferred to be assigned some heavier work to do.
    語法功能：表示與謂語動(dòng)詞同步發(fā)生
    2) 完成形式：
    He pretended not to have seen me.
    被動(dòng)形式：
    The book is said to have been translated into many languages.
    語法功能：表示發(fā)生在謂語動(dòng)詞之前
    二、不定式的省略
    1)感官動(dòng)詞
    see, watch, observe, notice, look at, hear, listen to, smell, taste, feel
    + do 表示動(dòng)作的完整性，真實(shí)性;
    + doing 表示動(dòng)作的連續(xù)性，進(jìn)行性
    2) 使役動(dòng)詞have bid make let 等詞后不定式要省略但同1)一樣被動(dòng)以后要還原to
    三、不定式?？嫉目键c(diǎn)
    1)不定式做定語---將要發(fā)生
    2)不定式做狀語----目的
    3)不定式充當(dāng)名詞功能---To see is to believe.
    四、有些動(dòng)詞后只跟不定式如：
    want，wish，hope，manage，promise，refuse，pretend，plan， offer，decide，agree，
    expect allow sb to do,
    causeto do , permit sb to do, enable sb to do
    force sb to do. be more likely to do love to do
    warn sb to do beable to do be ambitious to do.
    begin to do . start to do
    五、有的時(shí)候to后面要接-ing形式
    accustom (oneself) to; be accustomed to;
    face up to; in addition to; look forward to;
    object to; be reduced to; resign oneself to;
    be resigned to; resort to; sink to; be used to;
    be alternative to; be close/closeness to;
    be dedication/dedicated to;
    be opposition/opposed to;
    be similarity/similar to.