1)雅思閱讀動詞不定式的構成:(以動詞“do”為例)

　　主動態(tài):一般式"to do";完成式"to have done";進行式"to be doing";完成進行式“to have been doing”

　　被動態(tài):一般式"to be done";完成式“ to have been done"

　　否定式:not+不定式

　　2)雅思閱讀不定式的時態(tài):

　　①不定式的一般式表示的動作與主句謂語動詞表示的動作同時發(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.)

　　②不定式的進行體表示的動作正在進行，與主句謂語動詞表示的動作同時發(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.

　　I hope to be earning my living in a year’s time.(I hope 1 will/would be earning my living)

　　I promised to be waiting at the door when he came out.

　　b 常用在"believe，consider，suppose，think，know，report，say，understand"等動詞的被動式之后。

　　He is thought/known/believed/said/supposed to be living in this area = People think/know/ believe/ say/suppose that she is living abroad.[據認為(據知，據信，據說，據猜測)她住在國外。]

　　[注]“be supposed to”通常含有“應該”意思，表示一定的責任和義務，在雅思閱讀中出現的很多。

　　You are supposed to know how to use a computer=You should know how to use a computer.

　　You are supposed to have been studying=You should have been studying.

　　Students are not supposed to cook in their dormitory=Students shouldn’t cook in their dormitory.

　　以上就是對于動詞不定式這一雅思閱讀知識點的相關介紹，考生朋友在閱讀的過程中注意一下，最后祝大家都能考出好成績。