need用在肯定句时,都是用实义动词.后要带to.You need to have a rest . need用在疑问句,否定句时,则实义动词,情态动词二种形式都有.可归结为口决:肯定句要带to,疑否句,有do才有to,无do便无to:Do you need to telephone her at once?Need you telephone her at once She doesn't need to go to school today .She needn't go to school today .
