怎样把英语句子变成否定句!

1。Tom never gets to school on time often selelow
②No one likes singing。
③Do not have hetler。
④LiPing dose not like English and math。
⑤You need not to Be quite。
⑥I ddo not have to。
⑦Let’s not go to school。
①Tom does't always get to ③ have no hetler。
④LiPing does't like English and math
=LiPing dislikes English and math
⑤ DON'T be quite,plese。
⑥I don't have to。
⑦Let’s not go to school。