1) 大部分形容词加-ly可构成副词。但 friendly，deadly，lovely，lonely，likely，lively，　　ugly，brotherly，仍为形容词。

　　改错：(错) She sang lovely.

　　(错) He spoke to me very friendly.

　　(对) Her singing was lovely.

　　(对) He spoke to me in a very friendly way.

　　2)有些以-ly 结尾既为形容词，也为副词。

　　daily，weekly，monthly，yearly，early

　　The Times is a daily paper.

　　The Times is published daily.