是it's necessary for us to sleep for 8 hours 还是is' necessary for us to sleep 8 hours?
问题描述:
是it's necessary for us to sleep for 8 hours 还是is' necessary for us to sleep 8 hours?
答
前者,for加段时间
答
后者吧,从句意角度。
答
为您
应该是it's necessary for us to sleep for 8 hours ,因为固定句型是:lt's nessery for sb to do sth,表示做某事对某人来说很重要.
翻译:让我们睡8小时的觉是十分必要的.
望采纳!谢谢.