这个办法可以大大节省时间。

Zhège bànfǎ kěyǐ dàdà jiéshěng shíjiān.

This method can greatly save time.

你这样做，大大帮助了我们全家。

Nǐ zhèyàng zuò, dàdà bāngzhù le wǒmen quánjiā.

By doing this, you have greatly helped our whole family.

你的中文水平大大提高了。

Nǐ de Zhōngwén shuǐpíng dàdà tígāo le.

Your Chinese level has greatly improved.