$1$. If we recycle, we will save natural resources

`->`Câu đk loại 1: If + S + V, S + will + V

$2$. If we don't hurry up, we will be late for work

`->`Câu đk loại 1: If + S + V, S + will + V

$3$. I asked him where he lived

`->`Câu hỏi tường thuật WH-: S + asked + O + WH- + S + V(lùi thì)

$4$. The examiner asked me what i did to improve my english

`->`Câu hỏi tường thuật WH-: S + asked + O + WH- + S + V(lùi thì)

$5$. Peter said he would come with mary as soon as he was ready

`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)

$6$. John said he had to stay at house that night to finish his housework

`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)

$7$. Nam said to hoa that he would help her whenever she need him

`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)

$8$. Lan said to me that i could use her telephone if i need it

`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)

$9$. the driver asked the passengers not to get off the bus while it was moving

`->`Câu hỏi tường thuật: S + asked + O + ( not ) + to + V

$10$. He said that he wished he knew the answer

`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)