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g…when…(剛要做…突然)④…h(huán)ad just done…when….(剛一…就)⑤Hardly/Scarcely had…done…when…(剛一…就)(2)before引導(dǎo)從句時(shí),詞義非常靈活,注意下列句子中的before的詞義: I could get in a word, the tailor had measured me.(還沒來得及…就) hadn’t run a mile before he felt tired.(還沒…就) had sailed 4 days before we saw land.(…才…) write it down before you forget it.(趁還…沒就)(3)till (until) 和not…till (until)1) till (until):主句謂語動詞必須是持續(xù)性的,意思是“到…為止“如:He remained there till/until she arrived.2) not…till (until)…: 主句謂語動詞必須是短暫性的,意思是“直到…才”如:She won’t go to bed till/until he returns home.3) not…until還有強(qiáng)調(diào)式和倒裝式:強(qiáng)調(diào)句:It is not until he returns home that she will go to bed. 倒裝句:Not until he returns home will she go to bed.(4)幾個極易混淆的時(shí)間狀語從句:1) It was +時(shí)間點(diǎn)+when…(當(dāng)?shù)臅r(shí)候時(shí)間是)It was 5 am when we arrived at the village.2) It was/will be+時(shí)間段+before…(沒過…就/過了…才)It was/will be two weeks before we met/meet again.3) It is /has been +時(shí)間段+since…(自從…以來有…)It is/has been 3 years since we last met.突破點(diǎn):一看be動詞的時(shí)態(tài),二看時(shí)間段還是時(shí)間點(diǎn)。注意:在“It is /has been +時(shí)間段+since…”句型中,從句的動詞必須是短暫性的,如果是延續(xù)性的動詞,時(shí)間要從從句的動作結(jié)束時(shí)算起。如:It is 3 years since I smoked.( 我戒煙有三年了)補(bǔ)充:as soon as, immed