Question

2．昨天下午她在家睡覺的時(shí)候，突然下雨了．
He was sleeping at home yesterday afternoon when it suddenly began to rain．．

Answer 1

分析 He was sleeping at home yesterday afternoon when it suddenly began to rain．

解答 答案：He was sleeping at home yesterday afternoon when it  suddenly began to rain．結(jié)合句意這里用含有when（當(dāng)…時(shí)）引導(dǎo)的時(shí)間狀語從句的主從復(fù)合句來表達(dá)，時(shí)間狀語yesterday afternoon昨天下午，故從句用一般過去時(shí)，故 it began to rain 天開始下雨（begin to do sth開始做某事），suddenly副詞"突然地"，放在began前，故when it suddenly began to rain．主句是表達(dá)過去某個(gè)時(shí)間正在進(jìn)行的動(dòng)作用過去進(jìn)行時(shí)was/were+過去分詞，主語he三單，故was，睡覺sleep的現(xiàn)在分詞sleeping，在家里at home，故答案是He was sleeping at home yesterday afternoon when it  suddenly began to rain．

點(diǎn)評(píng) while和when引導(dǎo)的時(shí)間狀語從句主句用一般時(shí)（一般過去時(shí)）從句用進(jìn)行時(shí)（過去進(jìn)行）． while引導(dǎo)的從句要加延續(xù)性動(dòng)詞  而when 延續(xù)和短暫性動(dòng)詞都可以 所以when有包含while．  while可以用when替換．但是when有時(shí)候不能用while替換． 比如     the telephone rings when I comeing in     這句就不能用while代替． when引導(dǎo)的時(shí)間狀語從句時(shí)態(tài)該用什么時(shí)態(tài)就什么時(shí)態(tài)．而while引導(dǎo)的時(shí)間狀語從句一般用過去進(jìn)行時(shí)    當(dāng)強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)發(fā)生時(shí) 用while而不用when． 比如I am cooking while Jane is practicing．