công thức passive:

- present simple: S + be + V3

- past simple: S + was/ were + V3

1. was written (past)

2. were taken (past)

3. were typed (past)

4. are collected (simple)

5. am often called (simple)

6. was sent (past)

mình gửi bạn nhé!

Choose the right tense.

1. was written ( "Romeo và Juliet" là 1 tác phẩm lâu đời -> Quá khứ đơn)

2. were taken (last holidays -> Quá khứ đơn)

3. were typed (yesterday -> Quá khứ đơn)

4. is collected (every -> Hiện tại đơn)

5. am often called (often -> Hiện tại đơn)

6. was sent (two hours ago -> Quá khứ đơn)