he_____(work)on the maths problems since seven o’clock.He _____(work)on it for two hours.i'm surehe_____(work)on the maths problems since seven o’clock。He _____(work)on it for two hours.i'm sure he_____(work)it out in one hour.麻烦认真回

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he_____(work)on the maths problems since seven o’clock.He _____(work)on it for two hours.i'm sure
he_____(work)on the maths problems since seven o’clock。He _____(work)on it for two hours.i'm sure he_____(work)it out in one hour.麻烦认真回答下

has worked;他从晚上7点,就开始做数学题.
has worked他做数学题做了2小时了
will
我肯定他会在1小时之内完成这道题.
祝好!

has been working.
has worked
will work

he___has been working__(work)on the maths problems since seven o’clock。
He __has worked___(work)on it for two hours.i'm sure he_will work____(work)it out in one hour
第一个是现在完成进行时,说明他还在继续做未停止,第...

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he___has been working__(work)on the maths problems since seven o’clock。
He __has worked___(work)on it for two hours.i'm sure he_will work____(work)it out in one hour
第一个是现在完成进行时,说明他还在继续做未停止,第二个是对目前的影响,用完成时,第三个是将来时,有时间状语

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he_____(work)on the maths problems since seven o’clock.He _____(work)on it for two hours.i'm surehe_____(work)on the maths problems since seven o’clock。He _____(work)on it for two hours.i'm sure he_____(work)it out in one hour.麻烦认真回 --------Where is Jim?He_____(want) on the phone. Where is Mak?He_____(run) on the grass. work on the relationship work on the He_____(go)skating on the ice every day in winter.填空 He_____(go)skating on the ice every day in winter.填空 He_____(come)into the room and put on his coat. 翻译:work on the computer work on the computer例句 I work on the day He_____(clean)the floor yesterday 1 The Great Wall is 7000 kilometre long ,and it will stop the wind from_____(blow)the earth away.2 Wangfeng is a worker at YuLin in shanxi,He_____(work)on the Great Green Wall with many other people.3 This kind of apples tastes_______and it sells ___ On sunday morning ,he_____(clean) his room ------_____ does your brother go to library,Jane?------He_____ the subway.A.with;on B.How;takes------_____ does your brother go to library,Jane?------He_____ the subway.A.with;on B.How;takes C.How;many D.How;far We're going to_____(work) on the farm next week.填空嘞!Lots of students like ____(eat)sweets.That's not good.填空Tt often____(rain)here in spring.He_____(stop)a thief in the street last weekBen ____(run)faster than his father_______(do)TOM jump 用一般现在时或现在进行时填空.1.Where____(be) Tom and Jim?They_____(play) football._____LinTao _____(play) footballs too?No,he____(mend) his bike.2.Where_____their father_____(work)?He_____(work) on a farm.But now he_____(not work).He___ 填work、works或workingBill____(work) on the work on the office的意思