【正文】
enyearold girl一個 16歲的女孩。 ①表示確指。 hundred, thousand, million, billion等前有具體數(shù)詞修飾時,不能用復(fù)數(shù)形式。 ten, hundred, thousand, million, billion等可以構(gòu)成短語,表示不確切的數(shù)量。 考點二 序數(shù)詞 1.基數(shù)詞變序數(shù)詞的規(guī)則。 first→1st second→2nd third→3rd fourth→4th ninth→9th eleventh→11th twentyfirst→21st twenty second→22nd twentythird→23rd 3.序數(shù)詞前常加定冠詞,如 the first book;如果序數(shù)詞之前有 形容詞性物主代詞則去掉 the,如 his first book, his fourteenth birthday。 You may have a third 。分子大于 1時,作分母的序數(shù)詞用復(fù)數(shù)。 Two thirds of the children are from 之二來自加拿大。 (1)either, neither, each, one,