(+) Somebody is responsible for this mischief

(-) Somebody is not responsible for this mischief.

(?) Is somebody responsible for this mischief?

(?)...

A: How can you collect your stamps?

B: Sometimes I exchange stamps with other people.

A: How can you collect your stamps?

B: I buy at the post office. I also ask the members of my family and my relatives.

My parents just bought a new pair of roller skates

Cái nào đứng trước cũng được nha bạn 

T.G.I.F là Thanks God it's Friday.

Nghĩa là Ơn Chúa, thứ Sáu đã đến rồi.

1. A pair of Robins has built a nest in the porch since last week​.

=> A nest in the porch has been built by a pair of Robins since last week.

​2. Marry is cutting the cake with a sharp knife.

=> The cake is being cut by Mary with a sharp knife.

3. The boys broke the window and took away some pictures.​

=> The window was broken and some pictures were taken by the boys.

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