Present Perfect Tense

Present Perfect Tense

The present perfect of any verb is composed of two elements : the appropriate form of the auxiliary verb to have (present tense), plus the past participle of the main verb. The past participle of a regular verb is base+ed, e.g. played, arrived, looked. For irregular verbs, see the Table of irregular verbs in the section called 'Verbs'.

·         Subject + have/has(haven’t/hasn’t) + V3 + Object + Complement

Example        :

-       She has played football. (positive)

-       She hasn’t played football. (negative)

Past Continuous Tense

The past continuous describes actions or events in a time before now, which began in the past and is still going on at the time of speaking. In other words, it expresses an unfinished or incomplete action in the past.The past continuous of any verb is composed of two parts : the past tense of the verb "to be" (was/were), and the base of the main verb +ing.

Example        :

-       They were waiting for the bus when the accident happened. (positive)

-       They weren’t waiting for the bus when the accident happened. (negative)

Past Future Continuous Tense

Formula :

Subject +should/would + be + verb 1-ing + object/adverb

                                                                                                        

“Should” use for subject I, You, They, and We. “Would” use for subject She, He, and It.

            Example        :

-       They told us that they should be having dinner when we visited them at night.

Past Future Perfect Tense

The Future Perfect Tense indicates that an action will have been completed (finished or "perfected") at some point in the future. This tense is formed with "will" plus "have" plus the past participle of the verb.

Example        :

-       Before he sees his publisher, Charles will have finished four chapters in his new novel.

-       A Democratic president will have been in the White House for nearly half of the twentieth century