Your question covers a massive area of the language. This kind of forum can only really answer specific questions once a student has studied the basics of a topic - we can't replace a textbook. What you could do is try to answer your own questions and give reasons for your answers.
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virginia2741)a- I think you are silly.All the time. You are a silly person.
virginia2741)b- I think you are being silly.Just now. You're in a silly mood.
virginia2742)a- I used to drive.Some time ago. Maybe not now anymore.
virginia2742)b- I usually drive.
Michael Chambers Teaching EnglishI'm not sure what the right approach on this forum to this kind of question from students should be.No one else is either, so don't feel like the Lone Ranger. I did not name the tenses because I thought the OP should at least try that part. I don't know what "language items" are so I ignored that. But I felt that the OP was