Question

clear description about tense

Answer 1

Which one? 

A tense is basically a way of expressing a particular time of an action. It can be in past, which would make it a Past Tense (e.g. Past Simple), in present - Present Tense (e.g. Present Simple) and in the future - Future Tense (e.g. Future Simple). 

There are however other ways than just tenses you can express time with, like [am/are + gerund] (I am going/doing/etc.~). We just need to remember that every expression works in the boundaries of some tense, even though it shows different time than the one you would expect, e.g. "I'd rather you didn't go" which uses past form (didn't) to express present/near future. 

Answer 2

Subjunctive Present
I    clear
you  clear
he   clears
we   clear
you  clear
they clear
Perfect
I    have cleared
you  have cleared
he   has cleared
we   have cleared
you  have cleared
they have cleared

Past
I    cleared
you  cleared
he   cleared
we   cleared
you  cleared
they cleared

Pluperfect
I    had cleared
you  had cleared
he   had cleared
we   had cleared
you  had cleared
they had cleared

Future
I    will clear
you  will clear
he   will clear
we   will clear
you  will clear
they will clear

Future perfect
I    will have cleared
you  will have cleared
he   will have cleared
we   will have cleared
you  will have cleared
they will have cleared
Present
I    clear
you  clear
he   clear
we   clear
you  clear
they clear
Present
I    have cleared
you  have cleared
he   have cleared
we   have cleared
you  have cleared
they have cleared

Imperfect
I    cleared
you  cleared
he   cleared
we   cleared
you  cleared
they cleared

Pluperfect
I    had cleared
you  had cleared
he   had cleared
we   had cleared
you  had cleared
they had cleared
Conditional Imperative
Present
I    would clear
you  would clear
he   would clear
we   would clear
you  would clear
they would clear
 
Perfect
I    would have cleared
you  would have cleared
he   would have cleared
we   would have cleared
you  would have cleared
they would have cleared



you  clear

we   Let´s clear
you  clear


Progressive (Continuous) Forms Indicative Conditional Present
I    am clearing
you  are clearing
he   is clearing
we   are clearing
you  are clearing
they are clearing
Perfect
I    have been clearing
you  have been clearing
he   has been clearing
we   have been clearing
you  have been clearing
they have been clearing

Past
I    was clearing
you  were clearing
he   was clearing
we   were clearing
you  were clearing
they were clearing

Pluperfect
I    had been clearing
you  had been clearing
he   had been clearing
we   had been clearing
you  had been clearing
they had been clearing

Future
I    will be clearing
you  will be clearing
he   will be clearing
we   will be clearing
you  will be clearing
they will be clearing

Future perfect
I    will have been clearing
you  will have been clearing
he   will have been clearing
we   will have been clearing
you  will have been clearing
they will have been clearing
Present
I    would be clearing
you  would be clearing
he   would be clearing
we   would be clearing
you  would be clearing
they would be clearing
Perfect
I    would have been clearing
you  would have been clearing
he   would have been clearing
we   would have been clearing
you  would have been clearing
they would have been clearing