Revision questions: past time

Which past tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses. expresses a point of timeA particular moment in time. E.g.: She came home at six. ("six") I was born in 1980. ("1980") at which something happened, was happening or had been happening for some time?
Is the auxiliaryA helping verb used with main verbs to express mood, voice and tense. E.g.: I can't stand when I am disturbed. ("can", "am") did used in affirmativeA declarative sentence indicating "yes"; also called a positive sentence. E.g.: John likes squash a lot. sentences in simple past?
Which tense is to be used with the phrase just now?
How can past habits be expressed with continuousThe aspect expressing duration, formed with be + verb-ing. E.g.: What are you doing? tenses?
What is the difference between used to and would concerning past habits?
What is historic present?

Grammaring