连词有：in order that, so that, in case, for fear that
①in order that为了;以便。多用于正式文体，通常可以与so that换用。如：
You stopped at Hangzhou _____________ they could go around the West Lake.
他们在杭州停了下来，以便游览西湖。
The expert spoke slowly _________________________________________________.
专家讲得很慢，以便人人听得懂。
注意：in order to与so as to 也表示为了，以便于，但是后面只能接单词或短语，不能接句子，且so as to一般位于主句后，可与so that/ in order that进行同义句转换
He studies hard _____________ he can get good marks.
= _______________________________________________________________.
She gets up early ______________ get there on time.
= ______________________________________________________________.
= ______________________________________________________________.
②in case意思是以免,以防,多用于英国英语，它所引导的从句中的谓语动词可以是陈述语气形式，也可以是虚拟语气形式;
Take your umbrella in case it rains.
带上你的伞，以防下雨。
He took an umbrella with him for fear that it might rain.
他带了一把伞，以防下雨。
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