1) I'm afraid I can't get away.

恐怕我脱不开身。
2) No, I am afraid I can not

不恐怕我不能。
3) I'm afraid I can't spell it right.

恐怕我拼不对。
4) I am afraid I can not agree.

恐怕我不能同意。
5) I am afraid I can't help you.

恐怕我帮不了你。
6) I'm afraid I can't come.

我恐怕不能来。
参考词条