Negative sentence: S + has/have not been + V-ing.Positive sentence: S + has/have been + V_ing.In the sentence there are words, such as: Since, for, Already, just, ever, never, yet, recently, before, etc. Describe an action that happened in the past but causes the consequence at present.Describe an action that was completed in the very recent past, expressed by ‘just.’.Describe an action that started in the past and still continues in the present and future.Negative sentence: S + has/have not + V3/ed + O.Positive sentence: S + has/have + V3/ed + O.
Or verbs at the beginning of the sentence to warn about something, suggest or order something, such as: look!, listen!, be quiet!, etc. In the sentence there are adverbs of time, such as: Now , at the moment, at present, right now, etc. Warn about something, suggest or order something.Express a complaint about something, accompanied with “Always”.Describe a planned action in the future.Describe the action that is happening at the time of speaking.Negative sentence: S + am/is/are not + V_ing + ….Positive sentence: S + am/is/are + V_ing + ….In the sentence there are frequency words, such as: Everyday / night / week, often, usually, always, sometimes, etc. Describe a schedule, a program, or a timetable.Describe a habit, hobby, or action that repeatedly happens in the present.Negative sentence: S + am/is/are not + O.
