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.