•He was/felt suddenly afraid.他突然害怕起来／感到恐惧。

•I've always been afraid of flying/heights/spiders.我一直都怕坐飞机／惧高／怕蜘蛛。

•She was afraid for her children (= feared that they might be hurt).她很担心孩子的安全。

•[+ to infinitive] Don't be afraid to say what you think.不要害怕说出自己的想法。

•[+ (that)] She was afraid (that) he might be upset if she told him.她担心告诉他之后他会不高兴。

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•This is your room - it's rather small, I'm afraid.这是你的房间——恐怕是小了一点。

•I don't agree at all, I'm afraid.对不起，我完全不能同意。

•I'm afraid you've completely misunderstood the question.恐怕这个问题你根本就没有理解对。

•[+ (that)] I'm afraid (that) we can't come this evening after all.很遗憾，我们今天晚上终究还是来不了了。

•"Was she impressed with our work?" "I'm afraid not (= No)."“她赞赏我们的工作吗？”“恐怕并非如此。”

•"Does this mean I've got to leave?" "I'm afraid so (= Yes)."“这是不是意味着我必须离开了？”“恐怕是这样。”