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can have done
mustn't
have
done
和
can
't have done的区别最好有例子
答:
can
't
have
done
表示以前不可能做某事.例句 ---Where___Margaret have put the empty bottles?---She___them away.They must be somewhere.A.can;can't have thrown B.must;must have thrown.C.must;needn't D.can;must throw 答案为A.第一个句子是一个疑问句而且表示可能性的推测,所以...
can
't
have
done
是什么意思?
答:
can
't
have
done
(不可能做过)是must have done(一定做过)的否定形式。couldn't have done(可能没做过)是may have done(有可能做过)的否定形式。一般认为can't have done有80%以上的把握.而couldn't have done则委婉的多,只有50%左右的把握.must do /can't do一定,肯定80%把握。may/...
can
't
have
done
是什么意思?
答:
can
't
have
done
(不可能做过)是must have done(一定做过)的否定形式。couldn't have done(可能没做过)是may have done(有可能做过)的否定形式。一般认为can't have done有80%以上的把握.而couldn't have done则委婉的多,只有50%左右的把握.must do /can't do一定,肯定80%把握。may/...
求教几组词用法区别SHOULD
HAVE
DONE
COULD HAVE DONEWOULD HAVE DON...
答:
三、 “
can
+
have
+
done
”表示对过去行为的怀疑,用于疑问句,译成“可能做过……吗?”.1.There is no light in the room.
Can
they have gone out?屋里没有灯,他们可能出去了吗?2.There is nowhere to find them.Where can they have gone?到处找不到他们,他们可能到什么地方去呢?四、 “could...
有mustn't
have
done
这种形式吗?与
can
't have done啥区别。
答:
can
't
have
done
表示以前不可能做某事。例句 ---Where___Margaret have put the empty bottles?---She___them away.They must be somewhere.A.can;can't have thrown B.must;must have thrown.C.must;needn't D.can;must throw 答案为A.第一个句子是一个疑问句而且表示可能性的推测,所...
情态动词+
have
done
的用法?
答:
4. could (不能用
can
)
have
done
表示“过去本能够做某事却未做。”注意:其否定形式 couldn't have done 没有虚拟语气的用法,couldn't have done 只能表推测,相当于 can't have done,意为:“过去不可能做了某事。”5. might (不能用 may) have done 表示“过去本可以做某事却未做。
can
't
have
done
的用法和解释是什么?
答:
couldn't
have
done
和
can
't have done都表示不可能,是对过去情况的推测。例句:He can't / couldn't have worked out the problem.他不可能解决了这个难题。can't 也可以用于对现在情况推测,couldn't have done可以用 和过去事实相反的虚拟语气。例如:If you hadn't gone to the party,you ...
could
have
done
和might have done的区别是什么?
答:
could (不能用
can
)
have
done
表示“过去本能够做某事却未做。”注意:其否定形式 couldn't have done 没有虚拟语气的用法,couldn't have done 只能表推测,相当于 can't have done,意为:“过去不可能做了某事。”I think that he couldn't have gone abroad. I saw him just now.我...
情态动词+
have
done
的用法?
答:
4. could (不能用
can
)
have
done
表示“过去本能够做某事却未做。”注意:其否定形式 couldn't have done 没有虚拟语气的用法,couldn't have done 只能表推测,相当于 can't have done,意为:“过去不可能做了某事。”5. might (不能用 may) have done 表示“过去本可以做某事却未做。
could
have
done
与might have done的区别是什么?
答:
could (不能用
can
)
have
done
表示“过去本能够做某事却未做。”注意:其否定形式 couldn't have done 没有虚拟语气的用法,couldn't have done 只能表推测,相当于 can't have done,意为:“过去不可能做了某事。”I think that he couldn't have gone abroad. I saw him just now.我...
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