1.you should tell your cousin that he must return something of mine .
你应该告诉你的堂兄必须归还我的东西.
2.you should go to his home or call him to talk about it.
你应该去他家,或者打电话,谈谈这件事.
3.l hope my suggestion will help you.
我希望我的建议能帮助你.
4.lt makes me happy./enjoy myself.高兴（怎么翻译? 高兴的动词是什么?）
5.形容词怎么变动词?wide=widen 加-en
名词怎么变动词? 找出词根,
动词怎么变名词?