Tenses

Present

Simple Present

Base verb (+ es/es for third person):

I watch the news every day.

Present Continuous

am/is/are + present participle:

I am watching the news.

Present Perfect

Has/have + past participle:

I have watched the news already.

Present Perfect Continuous

Has/have + been + present participle:

I have been watching the news since I was a teenager.

Past

Simple Past

Verb+ed or irregular verb:

I watched the news.

Past Continuous

Was/were + present participle:

I was watching the news.

Past Perfect

Had + past participle:

I had watched the news before I went to bed.

Past Perfect Continuous

I had been watching watching the news for 20 minutes 

before you came home.

Future

Simple Future

Will+verb

Am/is/are + going to + verb

I will watch the news / I am going to watch the news.

Future Continuous

Will be + present participle

Am/is/are + going to be + present participle:

I will be watching the news at 9pm. / I am going to be 


watching the news at 9pm.

Future Perfect

Will have + past participle

Am/is/are + going to have + past participle

I will have watched the news before 10pm. / I am going 

to have watched the news.

Future Perfect Continuous

Will have been + present participle

Am/is/are + going to have been + present participle




PRESENT TENSE

1) Simple Present Tense-

Indicates an action that is generally true or habitual. That is, it took place in the past , continue to take place in the present, and will take place in the future. This tense is used to denote
-a habitual action- for instance, "He walk to school."
-general truths- for instance, "The sun rises in the east", "Honesty is the best policy."
-a future event that is part of a fixed timetable- for instance, "The match starts at 9 o' clock."
Note
a. The form of Simple Present Tense is- verb (infinitive without 'to' and agreeable with the subject)

2)  Present Perfect Tense-

Indicates an action that has been completed sometime before the present moment, with a result that affects the present situation.
For example, "He has finished the work."
                         "He has slept."
Note
a. The form of Present Perfect Tense is- has/have + verb (past participle form or 3rd form of the verb)

3)  Present Continuous Tense-

Indicates an action that is taking place at the moment of speaking.
For example, "She is walking."
"I am studying."
Note
a. the form of Present Continuous Tense is- is/am/are + verb + ing

4) Present Perfect Continuous Tense-

Indicates an action that started in the past and is continuing at the present time. 
For example, "He has been sleeping for an hour."
Note
a. The form of Present Perfect Continuous Tense is- has/have + been + verb + ing

PAST TENSE

1) Simple Past Tense-

Indicates an action took place before the present moment and that has no real connection with the present time. 
For example, "He danced in the function." (The action took place in the past, is finished and is completely unrelated to the present)
                         "He flew to London yesterday."
Note
a. The verb 'flew' is an irregular verb which does not take 'ed' in the past tense like regular verbs.
b. The form of Simple Past Tense is - verb + ed

2) Past Perfect Tense-

Indicates an action in the past that had been completed before another time or event in the past.
For example, "He had exercised before it started to rain."
                         "He had slept before I came back from the market."
Note
a. The form of Past Perfect Tense is- had + verb (past participle form or the 3rd form of the verb)

3) Past Continuous Tense-

Indicates an action going on at some time in the past or an action in the past that is longer in duration than another action in the past.  
For example, "It was getting darker."
                        "The light went out while theywere reading."
Note
a. The form of Past Continuous Tense is- was/were + verb + ing
 

4) Past Perfect Continuous Tense-

Indicates an action in the past that took place before another time or event in the past and continued during the second event/time point in the past.
For example, "At that time, he had been writing a novel for two months."
                         "He had been exercising when I called." 
Note
a. The form of Past Perfect Continuous Tense is- had + been + verb + ing

FUTURE TENSE

1) Simple Future Tense-

Indicates an action that will take place after the present time and that has no real connection with the present time. 
For example, "She will visit her ailing grandmother soon."
                        "He will walk home."
Note
a. the form of Simple Future Tense is- will/shall + verb

2) Future Perfect Tense-

Indicates an action in the future that will have been completed before another time or event in the future.
For example, "By the time we arrive, he will have studied."

Note
a. The form of Future Perfect Tense is- will/shall have + verb(past participle form or 3rd form of the verb)

3) Future Continuous Tense-

Indicates an action in the future that is longer in duration than another action in the future.
For example, "He will be walking when it starts to rain."
Note
a. The form of Future Continuous Tense is-will/shall be + verb + ing

4) Future Perfect Continuous Tense-

Indicates an action in the future that will have been continuing until another time or event in the future.
For example, "He will have been exercising an hour at 2:00."
Note
a. The form of Future Perfect Continuous Tense is- will/shall have been + verb + ing