1） close与closely

close意思是"近"； 

He is sitting close to me.

closely 意思是"仔细地"；

Watch him closely.

2）late 与lately

late意思是"晚"； 

You have come too late.

lately 意思是"最近"；

What have you been doing lately?

3）deep与deeply

deep意思是"深"，表示空间深度；

He pushed the stick deep into the mud.

deeply时常表示感情上的深度，"深深地"；

Even father was deeply moved by the film.

4）high与highly

high表示空间高度；

The plane was flying high.

highly表示程度，相当于much；

I think highly of your opinion.

5）wide与widely

wide表示空间宽度；

He opened the door wide.

widely意思是"广泛地"，"在许多地方"

English is widely used in the world.

6）free与freely

free的意思是"免费"；

You can eat free in my restaurant whenever you like.

freely 的意思是"无限制地"；

You may speak freely; say what you like.