All present tense and past tense are hasty

The simple present tense has three distinctions from the simple past tense in meaning, usage, and syntactic structure:

First, the meaning is different.

1. The simple present tense is a grammatical form. A temporal state that indicates an action or state of normality, regularity, habitual inertia, truthfulness, or an event in which the action occurs regularly in time.

2. The simple past tense denotes an action or state that occurred in a certain time in the past; Habitual, regular actions and behaviors in the past. In English grammar, tense refers to the time when an action takes place, and tene refers to the appearance and state of an action.

Second, the usage is different.

1. The simple present tense is used to denote a regular or habitual action or state of being; to express objective facts or universal truths; In adverbial clauses such as time, condition, etc., the future is denotated. It can be in some sentences that start with here, there, to indicate an action that is taking place.

2. The simple past tense indicates that it happened at a specific time in the past, and it can also indicate a habitual and frequent action in the past. Generally, the impact of the action is not emphasized, only the things that are explained. In general, the past is often used in conjunction with a temporal adverbial or clause indicating the past.

Use the past tense when denoting actions that occurred continuously in the past.

3. The syntactic structure is different.

1. In the general present tense, when the subject is the third person singular number, the verb becomes the corresponding third person singular form, such as the affirmative sentence form is the subject + the third person singular form of the verb + other; The negative sentence is the subject + doesn't't + verb form + other. When the subject is not the third person singular, the affirmative sentence is the subject + verb form + other, and the negative sentence is the empty subject + don't + verb form + other.

2. There is no third-person singular form in the general past tense, the affirmative sentence form is subject + verb past tense + other, and the negative sentence form is subject + didn't + predicate verb primitive form + other.

[Rules of change in the past tense].

In general, ed is added directly after the verb form.

Such as: wanted, played.

Verbs ending with the unpronounced letter e, add d directly.

Such as: hoped, lived.

To stress a closed-syllable word, you need to double write the last consonant letter and add ed. For example: stopped, shipped.

Verbs ending in the consonant letter + y change y to i and add ed.

e.g. studied, worried.

Some verbs do not conform to the above rules and require special memory.

Such as: am(is)-was, are-were, go-went, eat-ate, swim-swam, buy-bought, see-saw, teach-taught, bring-brought, think-thought, fall-fell, hurt-hurt, break-broke, win-won, lose-lost

The structure is as follows:

Affirmative form: subject + verb past tense + other.

Example sentence: She came to help us in those days

Negative form.

Subject +didn't + predicate verb form + other.

1）was/were+not

2) Add didn't before the action verb't, while reducing the action verb.

Example sentence: i didn't know you like coffee

General interrogative sentence structure.

1) DID + subject + predicate verb form + other?

2) was were+subject+predicate?

Example sentence: did i do homework?

Verb conjugation rules

1. General verbs are directly added to -ed, for example: look-looked.

2. Verbs ending in e directly add -d, for example: dance-danced.

3. If the consonant letter ends with y, change y to i and then add ed, for example: study-studied.

4. End with an accented closed syllable, with only one consonant letter at the end, and double write this consonant letter plus -ed, for example: skip-skipped.

5. Verbs ending in c should be changed from c to ck, and -ed should be added.

Simple present tense: 1Indicates what usually happens 2Indicates the eternal and unchanging theorem [auxiliary verbs am, is, are, do, does].

Simple Past Tense: Indicates something that happened in the past [was,were,did].

Simple future tense: to show something that will happen in the future [will do, be going to do] The simple present tense is the simple tense There is nothing else except the third person verb to become his three single form The general past tense is to show that something was done in the past This is to be expressed in the past tense of the verb Simple future tense There is usually will or be going to to indicate that something is going to be done, which is expressed by the original form of the verb These three tenses are only verb conjugations.