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.