(2013·高考新課標(biāo)全國卷Ⅰ)If we________now to protect the environment,we’ll live to regret it.
A.hadn’t actedB.haven’t acted
C.don’t actD.won’t act
C
選C。本題考查時態(tài)呼應(yīng)。A項hadn’t acted是過去完成時,表示“過去的過去”;B項haven’t acted 是現(xiàn)在完成時,指的是過去的動作對現(xiàn)在產(chǎn)生的影響或結(jié)果;C項是一般現(xiàn)在時,表示現(xiàn)在的經(jīng)常性行為;D項won’t act是一般將來時,指的是將來的動作。句意:如果我們現(xiàn)在不保護環(huán)境,將來我們會后悔的。根據(jù)“在含有條件或時間狀語從句的主從復(fù)合句中,如果主句的謂語動詞用一般將來時,那么從句中的謂語動詞常用一般現(xiàn)在時代替一般將來時”這一語法規(guī)則,以及該題主句的謂語動詞用了一般將來時的客觀事實來判斷,本題答案選C項。
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