Question

10．自從派了更多的警察在路口指揮交通，交通違章的人數(shù)大大減少了．（since）The number of people who break the traffic rules has decreased sharply since more policemen were sent to direct the traffic at the crossroads．．

Answer 1

分析 The number of people who break the traffic rules has decreased sharply since more policemen were sent to direct the traffic at the crossroads．

解答 The number of people who break the traffic rules has decreased sharply since more policemen were sent to direct the traffic at the crossroads．
根據(jù)句意"自從派了更多的警察在路口指揮交通"可知，句子主句的時態(tài)用現(xiàn)在完成時，since引導的從句用一般過去時，而定語從句中的時態(tài)用一般現(xiàn)在時表示一般性的行為．
本句為一主從復合句，since引導的為一時間狀語從句，主句中含有who引導的定語從句，修飾先行詞people，break the traffic rules交通違章；direct the traffic指揮交通．

點評 學會運用復合句，運用不同的句式能夠豐富句子的表達形式．