Giúp em với em cần gấp

Chuyển các câu sau sang thể bị động

`11`. I wasn't introduced to her mother.

- Bị động thì quá khứ đơn : S + was/ were + not + PII + (by O)

- "I" to be là "was"

- Dịch : Tôi không được giới thiệu với mẹ của cô ấy.

`12`. The rubbish was thrown away.

- throw - threw - thrown : ném, vứt

- Dịch : Rác bị vứt đi

`13`. Umbrellas and sticks must be left in the cloakroom by visitors.

- must be done : phải được làm gì

- leave - left - left : bỏ lại, để lại

`14`. The fruit has to be picked very early in the morning.

- have to be done sth : phải được làm gì

- Dịch : Trái cây phải được thu hoạch từ rất sớm vào buổi sáng.

`15`. I was weakened by a frightful crash at 4 a.m

`16`. A new tablet was bought to me b my father yesterday

- buy to sb : mua cho ai

`17`.

I was sent a lovely card by Jimmy at Christmas.

A lovely card was sent to me by Jimmy at Christmas.

- send to sb : gửi cho ai

`18`. The letter hasn't been stamped.

- Bị động thì hiện tại hoàn thành : have/has + not + been + PII

`\color{green}{\text{@Quyen}}`

`11.` I wasn't introduced to her mother.

`12.` The rubbish was thrown away.

`13.` Umbrellas and sticks must be left by visitors in the cloakroom.

`14.` The fruit has to be picked up very early in the morning.

`15.` I was wakened by a frightful at `4` am.

`16.` A new tablet was bought for me by my father yesterday.

`17.` I was sent a lovely card by Jimmy at Christmas.

`->` A lovely card was sent to me by Jimmy at Christmas.

`18.` The letter hasn't been slamped.