nǐ / néng / lái / bāngmáng / wǒ / yǐjīng / hěn / gǎnjī / le / bié tài kè qi / zuòxiàlái / hē / bēi / chá / ba

你能来帮忙我已经很感激了，别太客气，坐下来喝杯茶吧。

I am already very grateful that you came to help, so please don't be so polite; sit down and have some tea.