说 “if 和 or 不能用与同一句子” 是不对的,
反例太多了,
下面提供仅几个 if 和 or 连用的例子:
If you feel sick or unwell,you should see a doctor.
Just do as I say,no ifs,ands,or buts.
It's perfectly ok if you pay cash or by credit card.
Can I ask if you came alone,or did you bring someone with you?
If not today or tomorrow,then when will it be?
这都是地道的
我是加拿大人,英语母语.
希望帮到了你,