用should,ought to或have to的正确形式填空
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用should,ought to或have to的正确形式填空
He ________ (come) at 4 o'clock if the plane arrives on time.
I didn't go shopping this morning as I __________ (do) the housework
She ________ (come) to see me yesterday,but she forgot.
You _________ (ask) for permission before you left the table.
As they didn't understand,I _________(explain) everything again
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1.should come 2.had to do 3.should have come 4 should have asked 5 had to explain
用should,ought to,have to填空.
should/ ought to have
should ought to have done
ought to should had better must have to 的区别
should,ought to,与have to的区别
should must ought to have to的区别
用to,be或to have的适当形式填空
选用“should”“ought to”“had better”“have to”“must”及其否定式填空.
用to have或there be的适当形式填空
用have to的适当形式或must填空
ought to should 区别
should,ought to区别