英语六级语法知识：兼有两种形式的副词
1) close与closely
close意思是"近"; closely 意思是"仔细地"
He is sitting close to me.
Watch him closely.
2) late 与lately
late意思是"晚"; lately 意思是"最近"
You have come too late.
What have you been doing lately?
3) deep与deeply
deep意思是"深"，表示空间深度;deeply时常表示感情上的深度，"深深地"
He pushed the stick deep into the mud.
Even father was deeply moved by the film.
4) high与highly
high表示空间高度;highly表示程度，相当于much
The plane was flying high.
I think highly of your opinion.
5) wide与widely
wide表示空间宽度;widely意思是"广泛地"，"在许多地方"
He opened the door wide.
English is widely used in the world.
6) free与freely
free的意思是"免费";freely 的意思是"无限制地"
You can eat free in my restaurant whenever you like.
You may speak freely; say what you like.
From:https://www.zgghmh.com/CET-6/20008089.asp