1．laugh v. 大笑
laugh a hearty laugh ＝ laugh heartily
开怀大笑
laugh one's head off 笑掉大牙
2．grin v. 露齿而笑；咧着嘴笑
grin with delight 高兴得咧嘴而笑
grin from ear to ear 笑得合不拢嘴
3．chuckle v. 轻声地笑；窃笑；偷笑
chuckle to oneself 暗自发笑
chuckle at sB．/ sth. 对某人或某事偷笑
4．giggle v. 咯咯笑；傻笑
a fit of the giggles 一阵咯咯的笑声
giggle at some private joke
听到隐秘的笑话咯咯地笑起来
5．roar v. 放声大笑；喧哗
set the table in a roar 使哄堂大笑
roar with laughter 哄然大笑
