What is the present perfect progressive tense of the verb to investigate.

Progressive tense definition: The progressive tense is a verb tense that indicates a continuing action or an action in progress.

What is the Progressive Tense?

What are progressive verbs? The progressive verb tense, also called the continuous tense, is an English verb tense used to describe standing actions—actions that are in progress and ongoing. Information technology can be conjugated to be used in the past, present, or future.

The progressive tense is besides used in the perfect progressive of past, present, and future tenses.

The progressive tense is formed with a "to exist" verb conjugation and the present participle of a verb (-ing ending).

Equally mentioned above, the progressive tense indicates a continuing action or an action in progress.

Progressive Tense Examples

• 

  I am riding a bicycle. (continuing action)

• He is working on a project at schoolhouse. (action in progress)

Types of Progressive Tenses

There are three progressive tenses in English: the past progressive, the present progressive, and the future progressives tenses.

Encounter beneath for a brief description of each and click the link for a full description.

By Progressive

What is the past progressive tense? The by progressive expresses events that lasted for a duration of time in the past.

To grade the past progressive:

• Field of study + was/were + present participle (and "-ing" to end of the verb)

The past progressive is used to express:

• elapsing
  • I was reading.
• interrupted actions in progress
  • I was reading when he arrived.
• actions happening at the same time
  • I was lying on the bed while I was reading.
• polite question
  • He was wondering if you could assist him.

Present Progressive Tense

What is the present progressive tense? The present progressive expresses actions that are happening now or that are in progress.

To form the present progressive:

• Bailiwick + am/is/are + present participle (and "-ing" to cease of the verb)

The present progressive is used to express:

• actions that are happening now
  • Maria is watching tv set.
• actions that are in progress
  • Nosotros are choreographing a trip the light fantastic toe.

The present progressive tin can also be used for hereafter events.

• Subject field + am/are + going + infinitive
• She is going to take a test tomorrow.

Future Progressive

What is the future progressive tense? The future progressive usually expresses actions volition be happening (that subject field will be in progress doing) at some point in the future.

To form the future progressive:

• Subject + will be + present participle (and "-ing" to terminate of the verb)

The future progressive is used to limited:

• hereafter actions in progress
  • I will be finishing college next year.
  • They will exist vacationing soon.

Examples of Perfect Progressive Tenses

The progressive tense can also be combined with the perfect tense to class the perfect progressive tense. Here are the three perfect progressive tenses.

Past Perfect Progressive

What is the past perfect progressive? The past perfect progressive nearly often expresses actions in the past that were in progress before other actions.

To form the past perfect progressive:

• Field of study + had been + nowadays participle (and "-ing" to stop of the verb)

The past perfect progressive is used to express:

• Elapsing of a past action (but upward to a sure end point)
  • The water had been running for five minutes earlier she turned it off.
• Showing crusade of an action
  • They could not go to the beach because it had been thundering.
• Provisional statements
  • If the sun had been shining, they could have gone to the embankment.
• Reported voice communication
  • She said the weather had been frustrating.

Present Perfect Progressive

What is the present perfect progressive? The nowadays perfect progressive tense expresses deportment that began in the past and continue to the nowadays and actions that have recently stopped.

To form the present perfect progressive:

• Discipline + has/had + been + nowadays participle (and "-ing" to end of the verb)

The nowadays perfect progressive is used to express:

• actions that began in the past just continue to present
  • The dominicus has been shining all twenty-four hour period.
• actions that have recently stopped
  • They have been expecting you.

Time to come Perfect Progressive

What is the time to come perfect progressive? The time to come perfect progressive tense expresses actions that will last for a prepare fourth dimension at a specific moment in the future.

To grade the future perfect progressive:

• Subject + volition have been + present participle (and "-ing" to terminate of the verb)

The future perfect progressive is used to express:

• actions that volition have a specific time frame in the futurity
  • Past 2017, George will have been attention higher for five years.
  • We will accept been waiting for ii hours past the time programme lands.

Summary: What is a Progressives Tense?

Define progressive tense: the definition of progressive tense is a category of verb tenses used to draw standing action.

In summary,

• The progressive tense is used to indicate actions continuing or already in progress.
• The progressive tense has past, present, and future conjugations.
• It also is used to form the perfect progressive tenses.

To class the progressive tense, the "to exist" verb needs to be accordingly conjugated and added to a present participle verb.

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Source: https://writingexplained.org/grammar-dictionary/progressive-verb-tense