Question

could you give me a hand with this box?can you give me a han

Answer 1

不是所有 can you 开头的问句都可有 could you 代替

could you 是 can you 的委婉语态,

因此请求问句 can you 可改用 could you,

但其他情况下不可,比如

can you walk,or would you like me to get a taxi for you?

我是加拿大人,前英语老师.