1.Smile
1)Cheer up! Smile your tears away.
2)He gave a satisfied smile after the dinner.
2.Laugh
1)We couldn't stop laughing because the show was so hilarious.
2)If you don't want others to laught at your pronunciation,work harder to improve it!
3.Chuckle
1)My brother always chuckles when he reads a comic book.
2)He chuckled to himself when he remembered the trick he'd played on them.
4.Giggle(因感到有趣、窘迫或紧张而)格格地笑;傻笑
1)The girls giggled at my awful poem.
2) Some candidates giggled nervously as they waited for the interview.
5.Grin(露齿而笑;咧着嘴笑)
1)The waitress grinned at us as we walked in the restaurant.
2) He grinned with delight when he heard that his son won the match.
6.Sneer (冷笑;讥笑;嘲笑)
1)You may sneer, but a lot of people like this kind of music.
2) She'll probably sneer at my shoes because they're old-fashioned.
7.Roar (放声大笑)
1)The comedy was so wonderful that we all roared.
2) People roared with laughter on hearing the joke.