bai 14. viết lại câu. sử dụng trạng từ chi tần suất trong câu a; They read a book.{sometimes} b; Tom is very friendly.{usually} c; Ramon and Frank are hungry.{often} d; My grandmother goes for a walk in the evening.{always} e; walter helps his farther in the kitchen.{usually} g; They are happy.{always} h; She doesn't help her mother.{often}

Công thức thì HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

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ADV chỉ tần suất + V 

to be + ADV chỉ tần suất 

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a) They sometimes read a book.

b) Tom is usually very friendly.

c) Ramon and Frank are often hungry.

d) My grandmother always goes for a walk in the evening.

e) Walter usually helps his father in the kitchen.

g) They are always happy.

h) She doesn't often help her mother.

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