请问how long is forever?这句话对吗?

How long is it? How long is your 请问how long is forever?这句话对吗? how long is your legs还是how long are your legs?how long is your legs还是how long are your legs?请问这两个到底哪个才是对的呢?还有How big is your feet? How Long Is Long Enough 歌词 How long is the forever? HOW long is the marathon? how long is cocacola history? 请问It is about 15 minutes' walk.可以用How long does it take?来提问么How long does it take?这句话本身完整吗? How long is the desk?How tall is the building? How long is it?同义句 How long is the river同意句 how long is your desk?怎么回答 How long is it 中文怎么读 HOW long is it's taii How long is an Olympic Basketball game? how long is the way home How long is meeting going to last