Hogy vannak helyesen ezek az angol mondatok?

Generally it is children who like playing all the time.

Generally it was children who like playing all the time.

Generally those are children who like playing all the time.

Generally they were children who like playing all the time.

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They will feel better after they shall take the medicine.

They will feel better after they will take the medicine.

They will feel better after they shall have taken the medicine.

They will feel better after they have taken the medicine.

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Peter had stayed with the Johnsons the weekend before last.

Peter had been staying with the Johnsons the weekend before last.

Peter stayed with the Johnsons the weekend before last.

Peter has stayed with the Johnsons the weekend before last.