He might not have received our letter. / I haven't ever read such an interesting book. / My wife's parents has lent us some money. / I told him he had stolen the money. / We had three meals on board to prove that the flight was long.

He may not receive our letter. / People always read such an interesting book. / Our parents have lent us some money. / I said that he stole the money. / So long the flight was that we had three meals on board.

He may not have received our letter. / It has been the most interesting book I've never read. / My wife's parents have lent some money to us. / I accused him for stealing the money. / It was such long flight that we had three meals on board.

He may not have received our letter. / It's the most interesting book I've ever read. / My wife's parents have lent us some money. / I accused him of having stolen the money. / It was such a long flight that we had three meals on board.

Our letter may not have been received. / It's the most interesting book I've already read. / My wife's parents have lent us some money. / I advised him not to steal the money. / We had three meals on board as the flight was so long.