This centers is correct ??
They must have cheated the today's test so I should have advice to teacher.
彼らは今日のテストでカンニングしたに違いない、だから先生に教えるべきだった。

He may have already knew this things therefore I needn't have send e-mail to Mr. Kim. But some people can't have told this things to Mr. Kim.
彼はこの事をすでに知っていたのかもしれない、だから　私はキムにメールを送る必要はなかった。でも、誰もキムにその事を教えたはずはないのに。

助動詞の勉強中です。
Should have
must have
can't have
may have
needn't have

Question

This centers is correct ??
They must have cheated the today's test so I should have advice to teacher.
彼らは今日のテストでカンニングしたに違いない、だから先生に教えるべきだった。

He may have already knew  this things therefore I needn't have send e-mail to Mr. Kim. But some people can't have told this things to Mr. Kim.
彼はこの事をすでに知っていたのかもしれない、だから　私はキムにメールを送る必要はなかった。でも、誰もキムにその事を教えたはずはないのに。

助動詞の勉強中です。
Should have 
must have  
can't have
may have
needn't have

Answer

They must have cheated in today's test and I should have told the teacher.

He may have already known these things therefore I needn't to send an e-mail to Mr. Kim, but some people couldn't have told these things to Mr. Kim.

'this thing' = one thing
'these things' = many things

We generally use 'couldn't have' for past experiences, and we use 'can't have' more for present experiences.

Answers · 2

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