for fear that引導什麼從句

for fear that的`近義詞：lest

lest

釋義：免得，以免，(引出產生某種情感的原因)唯恐。

語法：lest所引導的從句中謂語動詞要用虛擬式，即“(should+)動詞原形”。

例句：

I was afraid to open the door lest he should follow me.

我不敢開門，唯恐他還跟着我。