Past perfect is formed with - had + past participle.
In the sentence - I had some dates - had is the past form of have and had is also the past participle of have
So your sentence in past perfect would be - I had had some dates.
In present perfect - I have had some dates.
Using another verb (not have) - I had eatensome dates. I had been to London.
Yes, in so far as all numbers are squares (of some number). But it is not a perfect square.
It is an integer value in some measurement units.
By making some serious mistakes.
Question: Is the number 48 a perfect square? Answer: The number 48 is not a perfect square because there is no integer, that when multiplied by itself equals 48. Some examples of perfect squares: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100...
A perfect square (commonly square number) is an integer that is the square of another integer. That is to say, a perfect square is the product of any whole number multiplied by itself.Commonly remembered perfect squares include, 1 (1x1), 4 (2x2), 9 (3x3), 16 (4x4) and 25 (5x5).
There is no irregular perfect tense.Present perfect tense is formed with have/has + past participle.See is an irregular verb. This is a present perfect sentence with see (past participle seen).I have seen the movie ten times.Past perfect is formed with had +past participle.Draw is an irregular verb. This is a past perfect sentence with draw (past participle drawn).I had drawn the picture before work finished.
Some examples are:By the end of the week, I will have walked 25 miles.All required reports will have been completed by the dates on which they are required.
The past perfect tense is used to keep time relationships straight. When you are talking about some past event, past perfect is for time before that.Let's say you're talking about the birth of baby Jill. She was born at some past time. When you speak of anything before her birth while you are talking about her birth, you use the past perfect to refer to that earlier time. For example:Jill was [past] born in 2005.When Jill was [past] born, her parents had been [past perfect] trying to get pregnant for two years.Now suppose you are writing a story all in the past tense, and you want to talk about events before the story began. It might go like this:Once there was [past] a little boy named Jack who had lived [past perfect] on a farm all his life. Now he had [past] his first chance to visit a city. He was [past] so excited! He had never seen [past perfect]tall buildings before.
Past Perfect TenseThis is used to express an action in the past before another action in the past. Both actions were completed some time in the past. It follows this structure: Subject + Had + Past Participle.Future Perfect TenseThis talks about a point in future time, which is often indicated in the sentence with by. It is predicted that the action is completed by that time. The action may or may not have started in the past. It follows this structure: Subject + Will + Have + Past Participle.So the difference is past perfect talks about actions that were completed (at time of talking) and future perfect talks about actions not completed (at time of talking)
The present perfect of run is has run (singular) or have run (plural). The present perfect tense is formed by combining has or have with the past participle of a verb to describe an action that began in the past and continues in the present or that was completed at some indefinite time in the past.
went
Depending on how you use the words some are already in the past tense. Got is the past tense of get. Present: I will get a dog. Past: I got a dog. With is a general term. It doesn't change in the past tense. Had is the past tense of has and had. Depending on which style of past you are using [progressive, perfect, progressive perfect, simple] will dictate how you use the word.
Perfect progressive tense is a verb form that indicates an action that started in the past, continued up to a point in the past, and may continue into the future. It is formed by combining the present perfect tense with the progressive aspect. For example: "I have been studying for three hours."
Past perfect is used with past simple to show two things that happened in the past, one before the other. The past perfect shows the event that happened first and the past simple shows the event that happened next eg When I arrived at the station the train had left. had left = past perfect, arrived = past simple In your sentence 'had appeared' happens first then 'noticed'
has seen - is present perfect (third person) - he/she/ the doctor has seen had seen - is past perfect (all persons) - he/ she / the doctor / we / they had seen. has seen - present perfect is used to talk about something that happened in the past and is related some way to now. eg He has seen the movie before. had seen - past perfect is used to talk about something that happened in the past before another thing (usually past simple) that happened in the past. eg He had seen the movie when he went to Hamilton.
Well, there are some variations. The adjective perfect has the comparative form more perfect, and the superlative most perfect.The verb perfect has the third person singular present perfects; the present participle perfecting; and the past participle perfected.And, of course, the present participle of the verb, perfecting is also a gerund. And the past participle perfected is also an adjective.The noun perfect is the present perfect, the past perfect, and the future perfect tenses for verbs. Other noun forms are perfecter, perfectness, perfection, and perfectionist.Lastly there's the adverb perfectly.
* infinitive: bring * past tense: brought * past participle: broughtExample sentences:* Please bring me some sweets when you go shopping. (present) * We brought you some yesterday! (past) * But, surprise! We have brought you some more today! (Present perfect, using the past participle)