Yesterday during class, my university teacher asked us which English tense we use the most. Few people answered. Our teacher said the American past tense is becoming much more common than the British English present perfect tense.

I know there are a few delictual differences in British v.s. American English.

A British person most likely would say ''Only a few people answered.''

While Americans would write: Few people answer.

''He didn't know his friend ate before he invited him to come by for lunch.'' Not sure how ate/eaten is used. I think it's AmE.

The other differences I am aware of are the auxiliary models:

''Are you coming with us?''

''I might do!''

''Are you coming with us?''

''I might''

It's worth mentioning that I'm not a native English speaker, and before coming to the US, I lived abroad for so many years, and I'm still unaware of those differences. When I went to ask my father yesterday about ''ate and eaten,'' he said that the usage of ''ate'' compared to ''eaten,'' is very common. He also stated it's wrong since many Americans are uneducated and do not know how to use tenses properly. The other thing I'm still unaware of is how American use nouns as verbs. And why in the US - the usage of I am is more common than I'm?