----I don’t know if it_        tomorrow. If it       ,we won’t go on a picnic.
A. rains, rains       B. will rain, rains          C. will rain, will rain
B

試題分析:if翻譯為是否,引導(dǎo)賓語從句。if翻譯為如果,引導(dǎo)條件狀語從句。根據(jù)句意可知,第一個if翻譯為是否,第二個翻譯為如果。賓語從句的結(jié)構(gòu):主語+謂語+連接詞+從句。從句在句中作賓語。從句要用陳述句的語序。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),如果主句是過去時(shí)態(tài),從句要用相應(yīng)的過去時(shí)態(tài)。根據(jù)句意,該句用將來時(shí)。在if引導(dǎo)的條件狀語從句中,如果兩個動作都沒有發(fā)生,為了區(qū)別動作的前后關(guān)系,先發(fā)生的用一般現(xiàn)在時(shí)態(tài),后發(fā)生的用一般將來時(shí)態(tài),即主將從現(xiàn)。故選B 。
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