deal
1.a great deal（许多）比a good deal（相当多）语气重。
2.a great（或good）deal of只用于不可数名词，不可用于可数名词，如可以说a great（或good）deal of money和a great（或good）deal of trouble，不可说a great（或good）deal of pounds和a great（或good）deal of troubles。但说I have seen a great（或good）deal of them lately是可以说的，这句相当于I have seen (very) much of them lately，作“我近来见过他们多次”解。说a great deal of laughter and kisses也可以，因为这里的kisses跟laughter用在一起，并不着重在“吻”的次数。
3.a great（或good）deal可以用作状语短语。例如：He is a great（或good）deal better today.
4.a deal用作a great deal解，是口语。
