the heavy work____(affect) his health ,so he looked much older?为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊!

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the heavy work____(affect) his health ,so he looked much older?为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊!
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the heavy work____(affect) his health ,so he looked much older?为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊!
the heavy work____(affect) his health ,so he looked much older?
为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊!

the heavy work____(affect) his health ,so he looked much older?为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊!
做这题的关键词是so
so为连词,连接的句子为并列句,上下文时态必须呼应,因此与下文looked呼应的话,上文必定填入affected
而估计你是把这句理解为主从复合句了,在主从复合句中,先发生的动作用过去完成时,后发生的动作用一般过去时.
如果把这句改为主从复合句可以用had affected
例如:He looked much older because the heavy work_had affected___(affect) his health

句中是对过去情形的一般性描述,并与现在有联系,因此用一般过去时;
过去完成时是对过去的过去情形的描述,必须是已经基于一个过去的时间点才能使用.

过去完成时是对过去的过去情形的描述,必须是已经基于一个过去的时间点才能使用
如果想用had affected 应该这样改
The heavy work had affected his health during the past few months, so he looked much older.
加上时间段(点),才能用过去完成时

是过去发生的,而且已经影响了现在了现在的健康,所以应该用过去时态~

now all the work____(finish) They finished the work____.A.in the end B.at last C.at the end D.A and B It's your duty to get the work____.A.to finish B.finishes C.finishing D.finished The house may fall down soon if no quick repair work____.A.will be done B.is done 1.the twins____in their bedroom at 8:00 last night.have 2.we have a lot of work____. the heavy work____(affect) his health ,so he looked much older?为什么填affected,不填had affected,过去的事情对现在产生的影响就是他看起来更加老啊! 英语翻译We have finished____ ____ of the work____ ____._______________________________________________________________________________________________________________________________________________________________________________________________ Everyone thinks Sandy will finish the work____ five minutes. I am sure they can finish the work____(success) the heavy a heavy ( ) the box is i can't carry it .A; what heavy B; what a heavy C; how heavy D; how a heavy 1.the box is __to carry.A.too much heavy B.much too heavy C.heavy too much D.too heavy much why couldn't they catch the 6:30train?Because they were delayed by()some heavy traffics,any heavy traffic,a heavy traffic,heavy traffic选哪个? what a heavy rain改为同义句 ( )heavy the rain( )快 he lives with his grandparents near a heavy street in the heavy street是什么意思 Tom finished the work alone.的同义句Tom finished the work____ _____ The ( ) (sonw) is very heavy.It is a ( )(snow) day.