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132. We have learned how to form the three principal time forms, present, past and future and the perfect or completed form of each of the three, present perfect, past perfect and future perfect. And still we have such a wonderful language that we can express other shades of meaning in time.

133. There is still another phase of action which we must have a verb phrase to express. Suppose you want to describe something you are now doing and are continuing to do, something not yet completed. To say, I do it now, is not satisfactory. Instead we say, I am doing it now.

You have by the verb phrase, am doing, described a progressive action, an action going on in the present. You may also want to describe what you were doing yesterday, an action that continued or progressed in the past. You would not say, I built the house yesterday but, I was building the house yesterday. Again you may want to describe an action which will be progressing or going on in the future. You do not say, I shall build the house next week but, I shall be building the house next week.

So we have progressive verb phrases.

134. The present progressive describes an action as continuing or progressing in the present.

It is formed by using the present time form of the verb be and the present participle.

You remember that the present participle is formed by adding ing to the simple form of the verb.

135. The past progressive time form describes an action which was continuing or progressing in the past. It is formed by using the past time form of the verb be and the present participle.

136. The future progressive describes an action which will be progressing or going on in the future. It is formed by using the future time form of the verb be and the present participle.

137. The perfect time forms also have a progressive form. There is a difference of meaning in the present perfect and its progressive form. You say for instance, I have tried all my life to be free. You mean you have tried until the present time and the inference is that now you have ceased to try. But, if you say, I have been trying all my life to be free, we understand that you have tried and are still trying.

138. So we have the present perfect progressive which describes an action which progressed in the past and continued up to the present time. It is formed by using the present perfect form of the verb be and the present participle.

139. The past perfect progressive describes an action which was continuing or progressing at some past time. It is formed by using the past perfect time form of the verb be and the present participle.

140. The future perfect progressive describes an action which will be progressing at some future time. It is formed by using the future perfect time form of the verb be and the present participle.

Exercise 1

In the following sentences mark all the progressive forms, and note whether they are present, past, future, present perfect, past perfect or future perfect.

1. The old order is passing.

2. Men will be struggling for freedom so long as slavery exists.

3. The class struggle has been growing more intense as wealth has accumulated.

4. The workers are realizing their power.

5. He had been talking for an hour when we arrived.

6. Next Monday I shall have been working for one year.

7. The workers will be paying interest on war debts for generations to come unless they repudiate.

8. While Marx was writing his books, he lived in abject poverty.

9. The Industrial Relations Commission has been investigating industrial conditions.

10. Ferrer was martyred because the Modern Schools were educating the people.

11. The nations of Europe had been preparing for war for many years.