Grammatical Tense

1. Simple Present Tense
The simple present is a verb tense with two main uses.
We use the simple present tense when an action is happening right now, or when it happens regularly (or unceasingly, which is why it’s sometimes called present indefinite).
Depending on the person, the simple present tense is formed by using the root form or by adding ‑s or ‑es to the end.

Example: --) I feel great! Adit loves pie. I’m sorry to hear that you’re sick.
         --) Tama practices the piano every day.

2. Past Tense
The past tense is a grammatical tense whose principal function is to place an action or situation in past time.

Example: --) I jumped in the lake yesterday.
         --) I bought the car yesterday.

3. Present Continuous Tense
The present continuous tense is used for actions happening now or for an action that is unfinished. This tense is also used when the action is temporary.

Example: --) I am singing at church today.
         --) The boys are playing ball after school.

4. Past Continuous Tense
The past continuous tense is used to mention an ongoing action of the past. It expresses past actions having an on-going nature. An action, that continued for some time in past, are expressed in Past Progressive Tense.

Example: --) I was planning about my studies.
         --) You were smiling to see me.

5. Present Perfect Tense
The present perfect tense is used to express an action that occurred or completed at some point in past. This tense expresses an idea of completion or occurrence of an action in past without giving an idea about the exact time of it occurrence.

Example: --) You have made a beautiful painting.
         --) They have made a plan for starting business.

6. Present Perfect Continuous Tense
The present perfect continuous is used to refer to an unspecified time between 'before now' and 'now'. The speaker is thinking about something that started but perhaps did not finish in that period of time. He/she is interested in the process as well as the result, and this process may still be going on, or may have just finished.

Example: --) I have been reading War and Peace for a month now.
         --) I haven’t been feeling well lately.

7. Past Perfect Tense
The past perfect tense is used to express two types of action which occured or completed in the past. It is usually used to express an action which occured a long time ago in past. It gives a sense of completion of an activity in past.

Example: --) She had earned a lot of money.
         --) You had gone before i reached.

8. Past Perfect Continuous Tense
The past perfect continuous tense is used to describe an action that began and was still in progress in the past before another past action started. In contrast to the past perfect tense, which describes a past action that finished before the second action started, the past perfect continuous emphasizes the continuous progress of that action.

Example: --) I’d been cleaning all day, so I was too tired to go out last night.
         --) We had been waiting for a long time when the bus finally came.

9. Future Tense
The Future Tense is a verb form that generally marks the event described by the verb as not having happened yet, but expected to happen in the future.

Example: --) He will go to Jakarta tomorrow morning.
         --) They will visit Bangkok tonight.

Source: Source:
https://www.grammarly.com/blog/simple-present/
https://en.wikipedia.org/wiki/Past_tense
http://www.studyandexam.com
https://www.ef.com/english-resources/english-grammar