need to do sth這里的need是實(shí)意動(dòng)詞,如果不用to的話就成了need作為情態(tài)動(dòng)詞的用法,need do sth.這句話意思是“在這里你得說(shuō)英語(yǔ)”（說(shuō)別的語(yǔ)言就怕別人都不懂）.need do sth什么意思 need to do sth什么意思表示should do something or has to do something應(yīng)該做或不得不做某事need do sth什么意思 need to do sth什么意思need to do sth 表示should do something or has to do something應(yīng)該做或不得不做某事用作情態(tài)動(dòng)詞時(shí)一般不單獨(dú)說(shuō)need do something。但可以在疑問(wèn)句或表示疑問(wèn)的從句中用，如I asked him whether he need go.也有少數(shù)情況下可以在肯定句中用I‘ll help you any time,you only need ask.(和only連用時(shí)）。更多情況下need當(dāng)作情態(tài)動(dòng)詞時(shí)是用在否定句和疑問(wèn)句中，如Need I tell Tom?Nobody need be afraid of catching the disease.