tā / dā / ying / bāng / zhù / wǒ / men / jiù / yí / dìng / huì / zuò / dào / zhēn / shì / yán / ér / yǒu / xìn

他答应帮助我们，就一定会做到，真是言而有信。

He keeps his promise to help us and will definitely do it.