《When was it invented?》SectionA PPT
《When was it invented?》SectionA PPT第2页

is spoken by

She speaks Chinese.

is spoken by

He speaks English.

English

English.

He

him.

Chinese

Chinese.

She

her.

被动语态(Passive Voice ) be + done

主动语态: 主语 + 动词 + 宾语 被动语态: 主语 + be + 过去分词 + by + 宾语