` 1. ` May I (sit) sit here?--Go ahead

` => ` S + may + Vinf

` 2. ` Children should (drink) drink a lot of milk. It's good for your health

` => ` sau should không chia động từ

` 3. ` Should we (drink) drink wine?-No, you shouldn't

` => ` sau should động từ không chia

4. When I (come) come to her house, she (work works in the garden. She (tell) tells me that she usually (do) does the gardening when she (have) has free time

` => ` dấu hiệu nhận biết : usually ( hiện tại đơn )

` => ` cấu trúc : S + V(es/s )  + O `

` \color{lightblue}{\text{#Sunny Mery} `