deal是可数名词。作交易，协议讲时可数，作大量，很多讲时只用单数形式。
第三人称单数 deals复数 deals现在分词 dealing过去式 dealt过去分词 dealt
It took a great deal of time.
这费了很多时间。
The new position invested her with a good deal of responsibility.
新职位赋予她重大的责任。
Thinking positively is one way of dealing with stress.
保持乐观是对付压力的一种方法。
