Hello, fellas. In this session we will discuss several expressions which are followed by –ing.
1) have fun/a good time
Example: I had fun watching movies.
Example: We had trouble looking for the key.
have a hard time/difficult time
Example: They had a hard time climbing the ladder.
2) spend/waste + expression of time or money
Example: Steve spent a lot of time reading novels.
3) sit/stand/lie + expression of place
Example: Angela sat on the floor typing a letter.
4) find/catch + pro(noun)
Both find and catch carry the meaning of discover.
Example: On my way home, I found a man crying for help.
Betty Schrampfer Azar, Understanding and Using English Grammar: Third Edition