a couple of 一對(duì)，兩，一雙
【例句】
兩個(gè)
There is a couple of boys waiting for you.
有兩個(gè)男孩等你。
一些，幾個(gè)
He must have a rest for a couple of weeks.
他必須休息幾個(gè)星期
【總結(jié)】a couple of + n(c).作主語時(shí)謂語動(dòng)詞通常用單數(shù)，接可數(shù)名詞復(fù)數(shù)
a crowd of 一群、許多
【例句】There is a crowd of papers and books is on his desk.有大堆文件和書籍在他的桌子。
【總結(jié)】a crowd of后接可數(shù)名詞。
【實(shí)戰(zhàn)演練】_____ cattle were dotted around the grass land with a little boy sitting on a rock.
A.A crowd of B.a bit of C.The number of D.A bunch of 答案：A 題意：一群牛羊分散在草地上，一個(gè)男孩坐在一塊巖石上。
【解析】a crowd of 一群、許多;a bit of 一點(diǎn);The number of…的數(shù)量，謂語動(dòng)詞要用單數(shù);a bunch of 一束、一捆。
a good/great deal of 大量
【例句】He seems to have a good (great) deal of money (trouble, etc.)
他好象有很多錢(麻煩事)。
【總結(jié)】a good/great deal of 接不可數(shù)名詞
a good/great many大量(接可數(shù)名詞復(fù)數(shù))
【例句】He had a good many friends here.
他在這兒有很多朋友。
【總結(jié)】a great many后面直接加復(fù)數(shù)可數(shù)名詞。
a great deal
大量的
【例句】A great deal of work awaits me.
許多工作等著我去做。
非常
【例句】He likes to swim a good_______.
他非常喜歡游泳。
【總結(jié)】a great deal用作名詞，意為“大量”，“許多”，作主語、賓語;用作副詞，意為“很”或“非?！保鳡钫Z，修飾動(dòng)詞或用來強(qiáng)調(diào)比較級(jí)。
【詞義辨析】a good many of, a good deal of, a good many, a good deal的區(qū)別與用法
a great deal of后加不可數(shù)名詞，如：
a great deal of money / rice/ water / information
而a good many后加可數(shù)名詞復(fù)數(shù)，如：
a good many apples / people / boxes / eggs
兩個(gè)詞意思是“很多，許多，大量的”的意思
a good many of后加可數(shù)名詞的復(fù)數(shù)或代詞的賓格，指“…中的許多/很多東西”，如：a good many of the apples/ them蘋果中的許多，他們中的很多，
請(qǐng)比較：
A good many students come from Shanghai.
A good many of students come from Shanghai
第一句：很多學(xué)生來自上海。
第二句：學(xué)生中有許多來自上海。
a great deal用作名詞，意為“大量”，“許多”，作主語、賓語;用作副詞，意為“很”或“非?！?，作狀語，修飾動(dòng)詞或用來強(qiáng)調(diào)比較級(jí)。如：
A great deal has been studied and this is the best way. 經(jīng)過大量研究后，這(被認(rèn)為)是好的辦法。