` 81 ` : Let 's go camping in Con Vanh beach this sunday 

` - ` Shall we + V nguyên mẫu = Let's + V nguyên mẫu

` 82 ` : How much is a bottle of cooking oil ?

` - ` How much + is / are + N ?

` 83 ` Is the post office in front of the pollice station

` - ` behind >< in front of : đằng sau >< đằng trước

` 84 ` : My father is travelling to Ha Noi by car

` - ` By + phương tiện giao thông

` 85 ` Nam father has a white car

` - ` adj + N

` HTĐ `

` ( + ) ` : S + Vs/es

81. Let's go camping in Con Vanh Beach this Sunday

- Let's V

82. How much is a bottle of cooking oil?

- How much tobe S?

83. Is the post office in front of the police station?

- in front of >< behing

84. My father is travelling to Ha Noi by car

- S am/are/is Ving

85. Nam's father has a white car

- a/an adj N