1- That man over there is an artist. I don't remember his name. (a relative word)
That man whose name I don't remember is an artist
2- The workers are working hard. Their lives are getting better. (a relative word)
The workers whose lives are getting better are working hard
3- Miss White is an English teacher. We studied with her last year. (a relative word)
Miss whitw whom we studied with last year is an english teacher
4- I saw the girl. She helped us last month. (a relative word)
I saw the girl who helped us last month
5- I bought a picture. It was very valuable. (a relative word)
I bought a picture which was very valuable
6-These shoes are of excellent quality. They are produced in that factory. (a relative word)
These shose which are produced in that factory are of excellent
7- The highest building is on Nguyen the street. It was built in 2002. (a to infinitive)
The highest building which was built in 2002 is on Nguyen the street
8- Mary is the only girl. She always brings me joys. (a to infinitive )
mary is the only girl who always brings me joys
9- The children are very nice. They live next door. (a participle)
The children who live next door are very nice
10- We stopped to swim in a small river. It looked very clean. (a participle)
We stopped to swim in a small river which looked very clean