Vasilyuk O.M. Test "The tense and aspect forms of the verbs ". Perfect Progresive form group. Active voice. Part IV. For 9-th year pupils (According to Alla Nesvit's course program).

• to talk about an action which started in the past and continues up to the present giving emphasis on duration;

to talk about a past action which has lasted for a period of time and its result is visible in the present

• to express an action that began before a certain point (or second action) in the past and continues at the moment (or simultaneously with this second action); to express an action that started at the moment in the past before another action and continues at the same time as this action

• to express an action that begins at a specific point before another future action and will continue at the time of the occurrence of this second action; to express an action that will take some time until the second situation in the future and may continue in the future

• for two hours, by, by the time, when I come, since this morning, all day, all day long

• for two hours, when I came yesterday, for a long time, all night, since, since yesterday, for

• for two hours, by, by the time / before when I come, all day long when I come tomorrow

• to talk about an action which started in the past and continues up to the present giving emphasis on duration; to talk about a past action which has lasted for a period of time and its result is visible in the present

• to express an action that began before a certain point (or second action) in the past and continues at the moment (or simultaneously with this second action); to express an action that started at the moment in the past before another action and continues at the same time as this action

• to express an action that begins at a specific point before another future action and will continue at the time of the occurrence of this second action; to express an action that will take some time until the second situation in the future and may continue in the future