so that 的意思是in order to,"为了,以便" He tries his best so that he can pass the exam. (主句和从句时态保持一致即可) 以上句为例,改为简单句:He tries his best,becuse he wants to pass the exam. 根据句意改变,不需要改变时态. 这个词组要注意的是和so.that的区别.(如此.以至于) 如:She is so kind that all the students like her. 她是如此善良以至于所有的学生都喜欢她.