The concept of past perfect tense, the difference between simple past tense and simple perfect tense

The past perfect tense indicates that an action or state has been completed or ended before a certain time or action in the past, or it may have been completed or ended long ago, i.e., "past past"; It can also refer to the continuation of past actions to a certain moment in the past. The past perfect tense is framed by "had + past participle of the verb", and had is usually used in any person.

The past perfect tense is mainly used in the following ways:

1.Represents an action or state of existence that has occurred or been completed at a time or before an action in the past. Temporal adverbials are often used in sentences guided by words such as by, before, when, and until.

It starts from a certain time in the past, so the past perfect tense is a relative tense that denotes "past past". It can only be used when compared to a certain time or action in the past. For example:

most of the guests had left when he arrived at the party.When he arrived at the party, he found that most of the guests had already left.

2.The past perfect tense can also denote an action or state that occurred before a certain moment in the past or continues to last until a certain time in the past, and is often used in conjunction with words such as for, since, etc. For example:

when jack arrived, he learned mary had been away for almost an hour.When Jack arrived, he learned that Mary had been gone for almost an hour.

3.For parallel sentences: A parallel sentence is in the past tense, and if another parallel sentence indicates an action earlier than the action in the past tense, then the past perfect tense is used.

For example: Tom flew home, but his father had already diedTom flies home, but his father has died.

4.The past perfect tense of some verbs denotes a hope, plan, or intention that was not fulfilled in the past. Commonly used verbs are hope, expect, suppose, think, want, wish, etc.

For example: they had hoped to be able to arrive before tenThey had planned to arrive before 10 o'clock.

5.In the guided clauses such as before, after, as soon as, etc., the past tense can be used instead of the past perfect tense since the conjunctions themselves already indicate the chronological order.

The past perfect tense denotes an action or state that has taken place or been completed before a certain time or action in the past. It indicates that the action described in the sentence takes place in the 'past past'. It can be said that the past time is about the past action, and it can also be said that the past time is about the past action.

That is, "the past of the past". It can be represented by a prepositional phrase such as by, before, or a temporal adverbial clause, or by an action that indicates the past, and perhaps by context.

Definition Past Perfect Tense: Indicates an action that has occurred or been completed before a certain time or action in the past. It indicates that the time when the action occurred is "past past" It indicates some kind of effect or result of an action that occurred in the past on a point in the past, and is used to designate an event that has been completed before another past action.

The difference between the general past and the general completion is very big, and the general past is that a lot has happened in the past, and the general completion is completed in the past, and it has been completed now.

The simple past tense is taking place in what has already happened, has already passed. Then the verb should be in the past tense, and the general perfect tense is that the action in the past has been completed, and the verb in the past perfect tense should be used.

The main difference between the present perfect tense and the simple past tense is that the present perfect tense emphasizes "the influence of what has been done in the past on the present, emphasizing the present", whereas the simple past tense talks about "what has been done in the past, emphasizing the past".

Simple past tense denotes something that happened at a time in the past, a state of being, or an action that happens frequently. The focus of the speech is only to state a past event, and the impact on the "present" is not emphasized. Such as:

he visited guilin in 1998.

The present perfect tense indicates that the action took place in the past, had an impact on the present, or produced an effect. It is not used in conjunction with a definite past time adverbial.

The simple past tense focuses on what happened in the past, and the present perfect tense generally denotes the impact of what happened in the past on the present, as a result.

The difference is very obvious, in the simple past tense, the past is to live as usual, in the present perfect tense, or in the perfect tense of a class.

The simple past tense is a voice that tells about these things that happened in the past. Whereas, the general perfect tense expresses the result that it has now been completed.

The past perfect tense denotes an action that has taken place or completed before a certain time or action in the past, and has caused some kind of impact or result on a certain point in the past, and is used to refer to an event that has been completed before another past action. In the English tense, the tense refers to the time when the action takes place, and the tense refers to the appearance and state of the action. It indicates that the time when the action takes place is the past and focuses on the outcome of things.

The usage of the past perfect tense is as follows:

1. Indicates the action completed at a certain time in the past or before the action is delayed;

2. Indicates an action or state that starts from a certain moment in the past and continues to another time in the past;

3. Narrating what happened in the past, and recounting it after having narrated what happened in the past.