I don’t know if he ________ back tomorrow. If he ______ back, I’ll let you know.
A. comes; will come             B. will come; came      C. will come; comes
C
if翻譯為是否,屬于賓語(yǔ)從句。如果主句是一般現(xiàn)在時(shí),從句根據(jù)需要選擇時(shí)態(tài),如果主句是過(guò)去時(shí)態(tài),從句要用相應(yīng)的過(guò)去時(shí)態(tài)。該句主句是一般現(xiàn)在時(shí),故根據(jù)句意從句用一般將來(lái)時(shí)。在if引導(dǎo)的條件狀語(yǔ)從句中,如果兩個(gè)動(dòng)作都沒(méi)有發(fā)生,為了區(qū)別動(dòng)作的前后關(guān)系,先發(fā)生的用一般現(xiàn)在時(shí)態(tài),后發(fā)生的用一般將來(lái)時(shí)態(tài),即主將從現(xiàn)。句意:我不知道明天是否他會(huì)回來(lái)。如果他回來(lái)了我會(huì)告訴你。故選C。
試題分析:
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