i don't know Whether you have received this card,but i still hope you like it

问题描述:

i don't know Whether you have received this card,but i still hope you like it
Whether 改成if可以吗~
我不知道您是否有收到这种卡,但我仍希望你喜欢它

可以.
但如果句子后面有not,如:I don't know whether you like the cat or not.这样的话就不能用if了.