3个问题 英语高手 快速回答!

1.穿/脱衣服用 put on/take off 貌似没听过用get on/get off的 get on/off 多用来表示上下车
2.expression为不可数名词,不加s
3.按你说的 只是no doubt 不用加that 从句 如：No doubt he was just trying to help
no doubt的另一种常见用法是 there is no doubt that...这是要加that从句的
当然 no doubt也可以跟about 如 There is no doubt about it.
希望能帮上你~