为他们喝彩用英语怎么说

"Cheer for them" 用英语可以说作 "give them a round of applause" 或 "give them a standing ovation"。
"Round of applause" 是指一阵热烈的掌声，用来表达对某人或某事物的赞赏。
"Standing ovation" 是指站立鼓掌，用来表达对某人或某事物特别高的赞赏。
例句:
Let's give them a round of applause for their hard work.
给他们一阵热烈的掌声，感谢他们的辛勤工作。
The crowd gave the singer a standing ovation at the end of the show.
演唱会结束时，观众站起来为歌手鼓掌。