when i opened thedoor ,i found in he come.only in this way we can improve our english study
he was made work very hard from morning till night .这三个句子分别错在哪

when i opened thedoor ,i found in he come.
come→came,整句都是过去式,所以come 也要变成过去式.不过这句的found in 不通顺,似有错误,可能是你拼写错了.
only in this way we can improve our english study
we can→can we 因为介词短语（in this way ）提前,全句必须用部分倒装---把can 提前.
he was made work very hard from morning till night .

came; can we;made to work
1\come-came 2\study-studies对应we所以用复数。3\be did为被动，所以was不对，应为has made~~
came; can we;made to work
when i opened the door, i found in he came. only in this way we can improve our english studies. he was made to work very hard from morning till night.

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