关于英语that用法突然遇到一个句子心中有疑问提出,I'm afraid that I can't get upI'm

关于英语that用法突然遇到一个句子心中有疑问提出,I'm afraid that I can't get upI'm 关于句子中that的意义,比如i'm afraid that i can't I'm afraid that I can't. i'm afraid that i can't I'm afraid that he can't ...能不能去掉“that”? I'm afraid that I can't get up. 这是什么句型? I'm afraid I can't get there before 9 o'clock.That's OK.Ther I think that I've hurt my back.I'm afraid that I can't get u 请教英文知识I'm afraid that I can't get up我恐怕站不起来了I'm afraid I can 一道英语情景对话------I'm afraid that i can't finish the task as soo I'm afraid that I can't.这句话为什么有两个主语?该 访问网页时报 ：I'm sorry Dave,I 'm afraid I can't do that错误