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They heard a message from a spacecraft.（用just改现在完成时） They __

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They heard a message from a spacecraft.（用just改现在完成时） They ___ just ___ a message from a s
They heard a message from a spacecraft.（用just改现在完成时）
They ___ just ___ a message from a spacecraft.
Have you got a letter from Lucy?（改同义句）
Have you ____ ____ Lucy?
To understand the problem is very difficult.（用it作形式主语）
_____ _____ very difficult ____ understand the problem.
I came here two days ago.（改同义句）
I ____ ____ here _____ two days.
Her mother has been to HongKong (seveal times).（对括号提问）
_____ _____ _____ has her mother been to HongKong?
They heard a message from a spacecraft.（用just改现在完成时） They __
They have just heard a message from a spacecraft.完成时have +done
Have you heard from Lucy?有谁的消息可以用hear
It is very difficult to understand the problem .前面加it is后面加to do这个句型是固定的.
I have come here for two days.完成时,for+一段时间表持续状态.
How many times has her mother been to HongKong?这个是问去了几次.
They heard a message from a spacecraft.（用just改现在完成时） They __ they received a message from a spacecraft.(用just改成现在完成时态) just as they began to eat,they heard a great noise的意思 they are usually curious about a person from __ country They haven't heard from Jim's letter for a long time.(改错) I heard some children __(sing) a song just now . They __（not have） many CDs ,But they __ （have）a lot of tapes they ___ for some time when a message came . they had drunk for some time when a message came . 用括号中动词的一般过去式,现在完成时,现在完成进行时填空 1.They a house fire.（just put o They live just ____ the road from us.A above B on C across D They heard from Miss Gao last week.