In written language. When they speak of past events, they use present perfect (conversational past).
Yes they do.
The past tense is used.
The past participle is come. The simple past is came.
used
To refer to actions that have happened in the past.
it is the simple past participle of 'have' as in - Have you had a good time
because the past tense
Internat speakers can play simple sounds, like the "beep" when you start the computer. See the related link for all the uses.
Yes that's correct.
Fought
Came is the simple past tense of 'come' whilst come is the past participle.
State verbs cannot usually have an -ing form. eg I am learning German - is a good sentence. I am knowing German - is not a good sentence it is better to use present simple - I know German I am loving it. - is not a good sentence it is better to use present simple - I love it.