how
1.how about...? 和what about...? 意思相同，作“…怎样？”解，如How（或What）about the weather? 和How（或What）about doing a show?
2.How beautiful a sight! 和What a beautiful sight! 都可以说，但第一种表达方式不普通，不可说How a beautiful sight! 或What beautiful a sight!
3.How do you do? 是相见时的口头语，双方都说这句，不需要I'm quite well, thank you等答语。
4.how ever和however不同。参见ever 5
