Các thì được sử dụng nhiều nhất trong tiếng anh giao tiếp

1.Present simple tense

 The simple present expresses an action in the present taking place once, never, always or several times. It is also used for actions that take place one after another and for actions that are set by a timetable or schedule. The simple present also expresses facts in the present.

(+) S + V-s/es 
I/you/we/they + learn  English.
He/She/It + swims well.
 
(-)  S + do/does not+ V 
I/You/We/They + don't learn English.
He/She/It + doesn't swim well.

(?) Do/Does + S + V? 
Do you/I/we/they + learn English? à Yes.I/We/They do ßà No.I …don’t
Does he/she/ it + swim well?    à  Yes.He/she/it + does ßà No. He …doesn’t

     2. Past simple tense

Describing actions and situations that happened in the past. These actions and situations were started and finished in the past. to talk about habitual or repeated actions that took place in the past, to refer to the historical past or to events that have happened in the distant past relative to the speaker, for reporting what someone said, to talk about action in the past that take place in the middle of another action, for making second conditional sentences (also called conditional type 2) when we talk about an imaginary or unlikely situation and to describe its result

* Positive form

- Regular verbs:
base form + "-ed" or "-d":
work + "-ed" = worked
live + "-d" = lived
- Irregular verbs: 
 I/you/he/she/it/we/they saw

* Nagative form

I
you             +       DID + NOT
he/she/it               /DIDN'T/
we                    + WORK
they

* Interrogative form

                 I
               you
DID    +  he/she/it   +    WORK?
                we
               they


3. Future simple tense

 to say that something will happen in the future. Adverbs of time that will indicate such tense may include, tomorrow, today, later today, in five minutes, in two hours, on Monday, on Saturday afternoon, next week/month, this year. to express spontaneous decision /
to volunteer to do something (the action is decided at the moment of speaking), to predict future events (for example, to say what we think or believe will happen), we use both 'will' and 'going to', to make promises or threats, to request help or to offer help, to talk about consequences (with if, when, provided, unless, as, as soon as, as long as, etc.)

* Affirmative form

I          +   shall / will  +  work
we

you
he/she/it       +  will  +  work
they
* Negative form

I             SHALL + NOT
we              /SHAN'T/                +             WORK

I
you              WILL + NOT
he/she/it           /WON'T/
we                                               +            WORK
they
 * Interrogative form

To form interrogative sentences we use will with all persons:

WILL        I       WORK?
                we

               you
WILL    he/she/it    WORK?
               they

4. Perfect present tense

The Present Perfect Tense connects the present to the past. It describes an action that happened in the past and goes right to the present moment. The time of occurrence of the action is not mentioned. Usually, the time is not important or is not necessary to know. It is the result of the action that matters. It tells us the outcome to date of the action. E.g., "Frank has gone" tell us that Frank is no longer with us.
for an action that happened in the past and the time of occurrence is not stated or implied. for an action or situation that began in the past and continues to the present. to express repetition of an action at unspecified time in the past. for an action occurring within a specific time period that is not over

* Affirmative 

S + HAS/HAVE + VERB (past participle form) + ... (rest of the sentence

* Negative

S + HAS/HAVE + NOT + VERB (past participle form) + ... (rest of the sentence

* Question

HAS/HAVE + SUBJECT + VERB (past participle form) + ... (rest of the sentence