English parts of speech :

The Future :

The future simple is used :
 - for predictions : what you think will happen or what is certain to happen.

e.g. You are going on a long flight.

The future continuous is used to refer to a future continuous action.

e.g.  You are going on a long flight.

Past Perfect Tense :

The present perfect is used to refer to actions which take place in an
unfinished time period up to the time of speaking.

The present perfect continuous tense is used to refer to an action
    which started in the past and continues today.
e.g. I have been learning English since September.

The present perfect simple is used to refer to the finished part of
    a continuous action.

e.g. I have learnt new vocabulary.

The present and past continuous :

The past simple tense is used to talk about finished actions in a finished period of time, 

for example :

Yesterday evening I played tennis with a friend.

Present Simple Tense is used:

1. To talk about regular activities ( e.g. John plays tennis once a week )

2. To talk about tastes (e.g. Peter likes Chinese food )

3. To talk about facts (e.g. The sun rises in the east )