從句,非謂語動詞,主謂一致,時態(tài)+被動語態(tài),情態(tài)動詞,虛擬語氣.不要買語法書,不適合應(yīng)試考試.1、考試的時候一定是時態(tài)和被動語態(tài)一起考的,你把經(jīng)常出現(xiàn)在選項中的那幾個分清楚就行咯；2、if引導(dǎo)的虛擬條件句只有三種況：1>與現(xiàn)在事實相反：if+were或過去式,主句用would\could\might;2>與將來事實相反：if+were to do \should do\過去式,主句should\could\might.:3>與過去事世相反：if+had done,主句用would have done
3、只要以否定詞開頭的,一律用倒裝；4主謂一致：neither..nor（單數(shù)）both...and（復(fù)數(shù)）either..or\not only...but also...（根據(jù)第二個主語決定）；the number of \one of\any one of +復(fù)數(shù)名詞、many a \more than one+單數(shù)名詞、主語是anybody\somebody之類的,謂語動詞一律用單數(shù).5、when 代表時刻,while代表時段.when he came in ,we were talking=while we were talking,he came in 6>非謂語動詞只要記著ing代表進(jìn)行、主動；ed代表完成、被去動；to do代表末做就行了.還要記著它們幾個的交錯運用.7>從句就太多咯,重要的是限定與非限定性從句、名詞性從句.