先说非连续动词，又叫非持续动词、终止动词、瞬间动词、短暂动词，指持续时间短暂的动词。如open, close, end, finish, leave, go ,come, join, become, get to, get, get to know, buy, borrow, lend, give等。连续动词，又叫持续动词，指持续时间长的动词。如read, work, walk, wait, be, keep, live, teach等。这两者的区别在现在完成时中具有典型的意义。英语中和汉语中不同，汉语的动词是“橡皮筋”，随长随短。英语则区分严格。由于汉英的这种差异，学起来是有点别扭。比如：He joined the Army 2 years ago.他两年前参军的。（过去时，强调动作本身）He has joined the Army.他参军了。(现在完成时，非连续动词，强调结果)He has been in the Army for 2 years.=He has been a soldier for 2 years=He has been in the Army since 2 years ago。(现在完成时，连续动词，强调“两年了”)他参军(当兵)两年了。这“两年”是时间段，所以必须用持续动词，所以改用“be” 短语。其它上述动词的区别与此类似
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