1. She doesn't run very quick.

$-$ Sau "do/does (+not)" là V_inf.

2. She ought not to eat too much.

$-$ Cụm: have to/ought to/must/should + V_inf.

3. My mother prefer walking to cycling.

$-$ Cụm: prefer something to something: thích cái gì hơn cái gì.

4. What about going to the movie this weekend? 

$-$ Why don't we + V_inf? = What about + V_ing?: đề nghị làm gì đó.

5. She enjoys playing guitar.

$-$ like/love/enjoy/dislike/hate + V_ing = like/love/enjoy/dislike/hate + to V.

--------------

$@haanx2$

`1`. She doesn't run quickly.

`-` Câu phủ định ( thì HTĐ): S+ do/ does+ not+ V

`-` run là động từ thường, bổ nghĩa cho động từ thường là adv

`2`. She ought not to eat too much.

`-` should+ not+ V `=` ought+ not+ to V: không nên làm gì

`3`. My mother prefers walking to cycling.

`-` prefer+ Ving+ to+ Ving: thích làm gì hơn làm gì

`4`. What about going to the movie this weekend`?`

`-` Why don't we+ V`?` Tại sai chúng ta không...`?`

`≈` What/ How+ about+ Ving`?` Thế còn làm gì thì sao`?`

`5`. She enjoys playing the guitar.

`-` enjoy+ Ving: thích làm gì