1、may I help you?
翻译:需要我帮忙吗?
may是个情态动词,无不定式和分词形式,第三人称单数现在时也无变化。
2、how can i help you?
翻译:需要我帮忙吗;有什么可以帮您。
3、do you need any help?
翻译:你需要帮助吗?
4、What can I do for you?
有什么事我可以为你效劳?
5、Do you need a hand?
需要我的援手吗?
同义句:What can I do for you? = How can I help you? =May I help you? =How may I help you? 意思都是你有什么需要帮助的吗?
what can I do for you?