1. Why don’t we camping at this park?     

    camping - go camping vì why don't we+ V

2. What about take a vacation in Sapa?     

   take - taking vì about + Ving 

3. Shall he have an abroad trip in this summer?

   he - you/ we vì Shall+ we/ I+ V 

4. Her doctor suggested that she loses some weights

   loses - lose vì khi dùng suggested, V đằng sau ko chia.

5. She suggested to have the car repaired as soon as possible.

   to have - having vì Chủ ngữ + suggest ( chia theo chủ ngữ) + V_ing

6.Let’s traveling abroad this summer holiday.

- traveling - travel vì Let's + V