I need a chair to sit on.I need a pen to write with.为什么课文上有这样的话：1.……is the best place to grow flowers.2.……is the best place to go.第一句后为什么不加in?第二句后为什么不加to?

I found a chair to sit on what i need si a book who can help I have not a chair to sit哪里错了 Bring me a chair to sit on.的on是表示什么?on在句子中是干嘛用的?去掉on改为Bring me a chair to sit.为什么?还有一句话的with也有同样的问题：I need a spoon to eat this ice cream with. I need a chair to sit on.I need a pen to write with.为什么课文上有这样的话：1.……is the best place to grow flowers.2.……is the best place to go.第一句后为什么不加in?第二句后为什么不加to? Now I need a place to hide i need a shoulder to cry on. i need to escape a time rain I need a chance to change 是什么意思 I need not to need 英语翻译Dear Chenguang,Can you bring some things to school?I need my hat,my notebook and a pen.My hat is on the chair.The book is on the floor,and my plant is on the desk.Thanks,Chenyang There is a p___under the chair.You need to water it every day.横线上因该填什么？ I found a chair to sit to sit on做什么成分? I haven't got a chair to sit in. to sit in在句中作什么成分? 帮填几道英语题:13.I haven’t got a chair __________.Will you make some room for me?A.sitting B.to sit C.to sit in D.to sit on14.-- I can’t find Dad.Where is he?-- I’m not sure.He __________ be in the study.A.must B.may C.need D.will15.Tom I have to[ ] .I have to get to the chair[ ] I need to talk to you与I need a cup of coffee的区别 I need a smoke 还是 I nee to smoke