How to distinguish between the present perfect tense and the simple past tense

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".

Hello, the difference between the present perfect tense and the simple past tense is:

Same: 1) The action basically happens before the speech is spoken.

2) Both tenses emphasize that the action occurs at (a certain point in time), but the present perfect tense can also be used to emphasize (burying the time period), which is not possible in the general past tense.

It is not the same: 1) Simple past tense: the action is already in the present when speaking, and has no relevance to the present and has no effect;

2) Present perfect tense: The action may have just ended while speaking, or it may continue into the future; If it is just over, the influence is manifested when speaking, and if it continues into the future, the influence occurs at the end of the future action. Bend gear.

So in a nutshell::

1) Simple past tense: An action begins before speaking [i.e., the beginning of the past] and ends before speaking [i.e., the end of the past], and has no correlation with the time of speaking [i.e., the present].

2) Present completion: a work begins before speaking [i.e., the beginning of the past], and at the time of speaking [i.e., now] it may end or continue into the future; If the speech ends, the impact is in the present at the time of speaking, and if the speech is not over and will continue into the future, then the impact will be in the future.

Respectively represented. It can be used in conjunction with the time adverbial expression that indicates the time period in which the action occurred from the past to the present and emphasizes the impact on the present, and cannot indicate the specific past time when the action occurred

It is used to indicate the actions that occurred or existed in the past. In some cases, the time of occurrence is not clearly indicated, but it is actually in the past, and the past tense is applied; Also, when talking about the deceased, the past tense is also often used.

One usage of the present perfect tense

The present perfect tense cannot be used alone with the exact time. The present perfect tense is often used in conjunction with the adverbial word that indicates an uncertain past tense. The present perfect tense is often used in conjunction with a temporal adverbial that indicates frequency.

The present perfect tense can also often be used in conjunction with temporal adverbials, including the present time.

The present perfect tense can also be used to indicate the action of rebirth during the past time and the present time. Present perfect tense"Unfinished usage"It refers to the action that began at some point in the past and continues to the present, or may continue to be in good shape.

Two Usage of Past Tense

The simple past tense denotes an action or state of existence that occurred at a certain time in the past, and can also denote an action that was recurring or reversed in the past. It is often used in conjunction with an adverbial to indicate the past.

Indicates the characteristics and states of things or people. Indicates regular, habitual movements. Represents objective reality.

The present perfect tense denotes the involvement of an action that happened in the past and its impact or result on the present. already, ever, never, just, before, yet or for since phrases are used, and the present perfect tense cannot be used in conjunction with a temporal adverbial that indicates the past.

Simple past tense denotes the past, an action that took place at a certain time, or a state of being. It is often used in conjunction with adverbials to indicate the past time, such as yesterday, last week, two years ago, etc.

As. he has lived here for 10 years.

he went to the park yesterday.

The present perfect tense denotes the impact or result of an action that occurred in the past on the present.

The simple past tense only emphasizes that things happened in the past.