(1) none可指人也可指物,意為“沒(méi)有一個(gè)人”或“沒(méi)有一個(gè)物”,可作代詞、形容詞和副詞,表示全部否定,作代詞表示三者或三者以上否定,和all反義,作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用單數(shù)或復(fù)數(shù),可以和of連用,如：
None has / have a watch.沒(méi)有人有手表.
None of us knows / know him.我們當(dāng)中沒(méi)有一個(gè)人認(rèn)識(shí)他.
(2) no one意為“沒(méi)有一個(gè)人”,“誰(shuí)也不”,專(zhuān)指人,不與of連用,作主語(yǔ),謂語(yǔ)動(dòng)詞用單數(shù),如：No one likes the book.沒(méi)有人喜歡這本書(shū).
No one knows how to do it.沒(méi)有人知道怎樣做那件事.
注意：在答語(yǔ)中多用none來(lái)回答以How many/much引導(dǎo)的問(wèn)句.而no one多用來(lái)回答以Who引導(dǎo)的問(wèn)句.如：
—How many birds are there in the tree?—樹(shù)上有多少只鳥(niǎo)?
—None.—一只都沒(méi)有.
—Who is in the classroom?—誰(shuí)在教室里?
—No one.—誰(shuí)都不在（一個(gè)人也沒(méi)有）.
綜合上述可得 正確答案是no one.