deal的过去式和过去分词是什么

　　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。