they were old then改为否定句

they were old then改为否定句 they weren't old then .they were young. They were young,then. they were young ,then . 改为同义句：They joined the army when they were 18 years old . Lucy and Lily could swim when they were five years old .改为否定句 改为单数句They were old teaches of Class Two.You are English doctors. 怎么翻译?They weren't old then!还有They were very young.是翻译成“他们非常年轻”,还是翻译成“他们以前很年轻” they are old computers改为单数形式 They are old jeeps. (改为单数句) they were good friends 改为一般疑问 They were my friends 改为否定句 They were my friend改为一般疑问句 they were delicious apples 改为感叹句 they went to swim in a lake then.改为同义句.They ( ) ( ) a lake ( ) ( )then. 用my,they ,were,old,grandparents连词成句急! THey were indroduced by an old friend ten years ago Some e____ said they were taken away in the UFOs,and then were s___back.