by the time you arrive this evening,_______ for two hours.a i will study bi willhave been studiedc i had studied d iwill have been studying

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by the time you arrive this evening,_______ for two hours.a i will study bi willhave been studiedc i had studied d iwill have been studying

by the time you arrive this evening,_______ for two hours.a i will study bi willhave been studiedc i had studied d iwill have been studying
by the time you arrive this evening,_______ for two hours.a i will study bi willhave been studied
c i had studied d iwill have been studying

by the time you arrive this evening,_______ for two hours.a i will study bi willhave been studiedc i had studied d iwill have been studying
答案选D
“by the time +将来时间”,用于将来完成时[will have done]或将来完成进行时[will have been doing],排除A,C.又由于B项是表示被动的,错误,故选D

by the time you arrive this evening,_______ for two hours.
a I will study b.I will have been studied
c I had studied d I will have been studying
选项是d

d iwill have been studying
表示将来的两个小时内一直在学习

选D,属于将来完成进行时,意思是“等你今晚到的时候,我将已经学了两个小时了(因为是进行时,所以届时仍在学)”
本题也可用排除法,首先by the time...表示一段时间,要用完成时,排除a,其次b中的study是被动语态,即“我被学习”,显然不对,c是过去完成时,时态不对(by the time后面跟的是一般现在时arrive,指示将来的时间,同when用法一样)。...

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选D,属于将来完成进行时,意思是“等你今晚到的时候,我将已经学了两个小时了(因为是进行时,所以届时仍在学)”
本题也可用排除法,首先by the time...表示一段时间,要用完成时,排除a,其次b中的study是被动语态,即“我被学习”,显然不对,c是过去完成时,时态不对(by the time后面跟的是一般现在时arrive,指示将来的时间,同when用法一样)。

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选D,用将来完成进行时。