我帮助她的英语表达方式有很多种，可以使用动词或动词短语来表达。
"I helped her." (我帮助她了。)
"I assisted her." (我协助她了。)
"I supported her." (我支持她了。)
"I gave her a hand." (我帮她一把。)
动词"help"表示“帮助”，"assist"表示“协助”，"support"表示“支持”，"give a hand"是一个习惯用语，意思是“帮助”。
例句：
I helped her with her homework. (我帮助她完成了家庭作业。)
I assisted her in finding a job. (我协助她找工作了。)
I supported her through her difficult time. (我在她困难时期支持她。)
I gave her a hand when she was moving. (当她搬家时，我帮她一把。)