1) We can only guess what his next move might be.
我们只能推测他在下一次将有什么动向。
这里的 guess 是指无十足的根据，只凭臆测之意。
2) If you canōt remember， just try to guess.
假如你想不起来，就猜一猜看。
这里的 guess 是全凭猜测。
3) What is your guess about the outcome of this meeting?
你认为这项会议的结果将会如何呢？
4) Do you often doubt yourself?
你时常怀疑自己吗？
5) There isnōt much room for doubt in this matter.
关于这件事，不大有质疑余地。
6) The doctor is afraid there is no hope for him.
医生担忧他已经无望了。
7) I am afraid I will not be able to accompany you.
我恐怕无法跟你在一起了。
8) She fears Tom will drop out of school.
她担心汤姆会休学。
9) Harry fears the worst.
哈里害怕最恶劣的事态