I havebeen lived inShanghai for5 years by the end of next month.
may you be happy.这是以情态动词开头的祈使句,而且may是青苔动词,后面的动词必须要用动词原形,所以只能用be,不能用were.这里的be可以用feel感觉这个单词来代替i will have been in shanghai ,可以不不行，will是将来时，这里用现在完成时就可以了可是是将来才到5年啊那可以啊