我可以帮助他用英文怎么说

"I can help him" 可以用英语表达为 "I can assist him" 或 "I can lend a hand to him"。

"Assist" 来源于拉丁语 "assistere"，意思是"在旁协助"。"Lend a hand" 是一个习语，意思是"提供帮助"。

例句:

"I can assist him with his homework."
"I can lend a hand to him if he needs help moving."

对应的中文翻译分别为：

"我可以帮助他完成家庭作业。"
"如果他需要帮助搬家，我可以提供帮助。"