句型变换：it's necessary for you to give up smoking(保持句子原意)
问题描述：
句型变换：it's necessary for you to give up smoking(保持句子原意)
答
Giving up smoking is necessary for you
答
to give up soming is necessary for you 。
答
It's necessary that you (should) give up smoking. 虚拟语气
答
To give up smoking is necessary for you.
答
Giveing up smoking is necessary for you.（改为动名词短语作主语）