lts necessary to还是for

lts necessary to还是 for lts necessary to还是for lts necessary to study geography at school Necessary+for还是to? necessary 后面是跟to 还是for? struggle fo you to 能不能帮我挑挑英语作文的毛病,分很低,我也不知道哪里错了,是时态还是动词还是句子不对?作文如下本人作文如下Dear editor,I'm writing to tell you about the discussion we've had about whether it is necessary fo 是it's necessary for us to sleep for 8 hours 还是is' necessary for us to sleep 8 hours? an necessary application 还是a necessary application be necessary for和 be necessary to的区别老师说be important to后面加人,如果还有下文用be important for sb doing sth那be necessary to 和be necessary是不是也是这种用法?还是说be necessary to do sth be necessary for doing st I think it necessary to do sth.还是 I think it is necessary to do sth.如果是前者,为什么从句中不要be动词? To be taken when necessary. 哈佛大学 的正确读音fu 还是 fo 佛 字到底念 fo 还是fu '哈佛大学的佛读fo还是”fu Do you think it necessary for me to give him a letter 这句话为什么不用is不应该是it is necessary .还是有什么额外的规则? an necessary application还是a necessary applicationthanks a million be necessary for和be necessary to 有何区别