$1.$ He drew that beautiful picture himself.

- himself là đại từ phản thân của "he".

$2.$ Don't help us, Dad! I and Jim can do it on our own.

- Do not + V (Bare)>

- Dùng own sau sở hữu từ.

$3.$ The manager made the decision on her own.

- on someone's own.

$4.$ They had to cook dinner on their own.

- had to + V.

$5.$ Lan fixed her dress yesterday herself.

- herself là đại từ phản thân của "Lan".

$6.$ Sara, was this poem written on your own?

- Was/ Were + S + V (Pii)?

$7.$ Nam cleaned his bicycle himself.

- himself là đại từ phản thân của "Nam".

$8.$ I'm learning to play the flute by myself.

$9.$ Nobody paid for the meal for him.

$10.$ Paul copies his friend's homework instead of doing it on his own.

- own one's own.

1.He drew that beautiful picture without any help.
=> He drew that beautiful picture himself
2. Don't help us, Dad! I and Jim can paint the car all alone.
 => Don't help us, Dad! I and Jim can do it on our own
3. The manager made the decision alone.
 => The manager made the decision on her own
4. They had to cook dinner by themselves.
=> They had to cook dinner on their own
5.  No one helped Lan fix her dress yesterday.
 => Lan wasn't helped to fix her dress yesterday.
6. Sara, did you write this poem on your own?
=> Sara, was this poem written on your own?
7. No one helps Nam clean his bicycle.
=> Nam isn't helped to clean his bicycle.
8. I am teaching myself to play the flute.
=> I’m learning to play the flute by myself.
9. He paid the meal for himself.
=> Nobody Nobody paid the meal for him.
10. Paul copies his friend’s homework instead of doing it alone.
=> Paul copies his friend’s homework instead of doing it on his own.

giải thích:

* Cấu trúc câu bị động

- Qúa khứ đơn:  S + was/ were+ Past Participle

- Dạng câu hỏi:

Ví dụ: ( trợ động từ đầu câu)

Did Mary write this letter? 

Bước 1 : 

Đổi sang câu thường :  bỏ did, chia động từ write thành quá khứ vì did là dấu hiệu của quá khứ

=> Mary written this letter.

Bước 2 :

Đổi sang bị động : làm các bước như bài 1 

=> This letter was written by Mary

Bước 3:

Đổi trở lại câu hỏi nghi vấn

=> Was this letter written by Mary?