can't have loved

English as a Second Language English Vocabulary, Grammar and Idioms
1

Are these sentences correct:

  1. His daughter must love him a lot to do all she has done for him.

  2. His daughter must love him a lot in order to do all she has done for him.

  3. His son mustn’t love him to leave him in that condition.

  4. His son mustn’t have loved him to leave him in that condition.

  5. His son can’t love him to leave him in that condition.

  6. His son can’t have loved him to leave him in that condition.

Meaning of 3-6: He has left his father in that condition, and that means he doesn’t/didn’t love him.

Gratefully,
Navi.

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2
  1. His daughter must love him a lot to do all (that) she has done for him.
  2. His daughter must love him a lot in order to do all she has done for him. - Why elongate the sentence this way? It isn’t natural/necessary.

3/5) His son can’t love him to leave him in that condition.
4/6) His son cann’t have loved him to have left him in that condition.

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