雅思閱讀：動(dòng)詞不定式用法詳解
動(dòng)詞不定式屬于我們很早就接觸了句式，在雅思閱讀過(guò)程中我們也會(huì)經(jīng)常接觸這一雅思閱讀知識(shí)點(diǎn)，為此小編特將關(guān)于動(dòng)詞不定式的雅思閱讀知識(shí)點(diǎn)分享給大家，希望對(duì)大家有所幫助，文中觀點(diǎn)僅供參考。
1)動(dòng)詞不定式的構(gòu)成：(以動(dòng)詞“do”為例)
主動(dòng)態(tài)：一般式"to do";完成式"to have done";進(jìn)行式"to be doing";完成進(jìn)行式“to have been doing”
被動(dòng)態(tài)：一般式"to be done";完成式“ to have been done"
否定式：not+不定式
2)不定式的時(shí)態(tài)：
①不定式的一般式表示的動(dòng)作與主句謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生或之后發(fā)生。
He seems to know her address.(：=It seems that he knows her address.)
I hope to see you again.(=I hope that I’11 see you again.)
�、诓欢ㄊ降倪M(jìn)行體表示的動(dòng)作正在進(jìn)行，與主句謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生。其用法主要有以下幾種情況：
a 常用在"appear，happen，pretend，seem，hope，promise"之后。
She pretended to be listening attentively.
Tom appeared to be living in this area.
b 常用在"believe，consider，suppose，think，know，report，say，understand"等動(dòng)詞的被動(dòng)式之后。
He is thought/known/believed/said/supposed to be living in this area = People think/know/ believe/ say/suppose that she is living abroad.[據(jù)認(rèn)為(據(jù)知，據(jù)信，據(jù)說(shuō)，據(jù)猜測(cè))她住在國(guó)外。]
[注]“be supposed to”通常含有“應(yīng)該”意思，表示一定的責(zé)任和義務(wù)，在雅思閱讀中出現(xiàn)的很多。
You are supposed to know how to use a computer=You should know how to use a computer.
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