Поставьте глагол-сказуемое предложения во все временные формы группы perfect, произведя все необходимые смысловые изменения every student has a tutor who plans his work.

Every student has had a tutor who plans his work.
Every student had had a tutor who plans his work.
Every student will have had a tutor who plans his work.
Every student would have had a tutor who plans his work.