1．一般现在时的被动语态构成：（am/is/are +done）如： This shirt is washed once a week. 这件T恤一周洗一次。

I am asked to study hard. 我被要求努力学习。

Visitors are requested not to touch the exhibits. 要求参观者不要碰展品。

Knives are used for cutting things. 刀被用来割东西的。

These songs are usually sung by boys. 这些歌曲通常是男生唱的。

一般现在时的主动语态变被动语态：1. Bruce writes a letter every week. → A letter is written by Bruce every week.2. This factory produces machine tools. → Machine tools are produced in this factory. 3. They often make fun of her. → She is often made fun of. 4. Everyone respects her. → She is respected by everyone.5. We clean our classroom every day. → Our classroom is cleaned by us every day.6. Do you wash your clothes very often? → Are your clothes washed very often?7. Most people in the USA speak English. → English is spoken by most people in the USA.8. people listen to this programme in many countries. → This programme is listened to in many countries.9. People speak English in many countries. → English is speken in many countries.10. Do you often clean your room? → Is your room often cleaned by you?。