文章试图以着眼点的转移理论来分析英语动词的时和体，它具有较强的解释力，可以尝试应用于英语教学中。
This paper tries to use the theory to analyze tense and aspect of English verb , finding that it is useful and can be applied to English tea.
while I was washing my hair中的动词是过去未完成时。
In 'while I was washing my hair', the verb is in the imperfect.
I am是动词to be现在时的第一人称单数。
'I am' is the first person singular of the present tense of the verb 'to be'.
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