a] I was sleeping at 2.00 a.m.- the verb "was sleeping" is in past tense continuous [ or progressive] tense ; your sentence is not complete : what was going on /what happened when I was sleeping?
I was sleeping when the storm started , or
I was sleeping when my sister was watching TV.
Note : In the Simple Past a specific time is used to show when an action began or finished. In the Past Continuous a specific time only interrupts the action.
b] Peter went to the cinema yesteday evening- past tense simple.
"Went" is the past tense form of the irregular verb "go" ; the past tense is also required by the adverb of time "yesterday" in your sentence.
c]past perfect continuous tense
Note : The Past Perfect Continuous is used to show that something started in the past and continued up until another time in the past. .
d] past perfect simple tense - The past perfect simple expresses an action taking place before a certain time in the past.
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