定语从句中由于涉及主句和从句,在这里也会有时态先后的问题,一般来说如果主句动词是将来时,从句用一般现在时或者一般过去时。
1.从句表现一般现在时的情况

A.The man who is appointed as a school principal will be a better leader.
被任命为学校校长人将会是一个更好的领导者。(用is appointed 不用 will be appointed)

B.There will be a special regulate for somebody who takes part in the competition next week.
对下周参加比赛的人将会有一个特殊的规则。(不用 will take, 而用 takes 一般现在时)

2.从句表示一般过去时的情况
A.So to speak, those books whose covers were printed red would sale on Chrismas eve.
这么说吧,那些封面被刷成红色的书将在圣诞前夕出售。(whose引导的定语从句时态为一般过去时,主句would sale 为过去将来时)

B.The fashion show which held in these countries would make an important influence.
在这些国家举办的时尚秀将会产生重要的影响。

3.但也有主句和从句都是一致时态的情况
A.Person who will go to watch movies next month will have to book tickets in advance.
在下个月要看电影的人将不得不提前订票。(主句和从句都用的一般将来时)

B.The cooperation which will be build up between two companies will be a significant event in business.
将要在两个公司直接建立的合作将会是一个商业界的重大事件。(主句和从句都表示将来)