The tenses

Past simple

An action that is completely over

I watched

Present simple

A habit

A general truth

I watch

Future simple

Things that will certainly happen

Predictions

Instant decisions

Opinions, intentions

I will watch

Past continuous

A longer interaction that was interupted by a shorter action

I am watching

Present continuous

An action going on that is not over yet

Fixed arrangements in the future

I am watching

Future continuous

An action that will be in progress in the future

A polite way to ask about someone’s plans

I will be watching

Past perfect simple

Earlier action finished before another action in the past

« When, before, after »

I had just watched

Present perfect simple

Action that started in the past but continues in the present

Result more important than action

« Just, already, yet, never, ever, for, since »

I have just watched a movie

Future perfect simple

Action that will be completed at a certain time in the future

I will have watched

Past perfect continuous

An action before another action in the past and stress on duration

I had been watching

Present perfect continuous

Action started in past, still going on, stress on duration

« For, since »

I have been watching

Future perfect continuous

An action that will be completed by a certain time in the future, stress on duration

I will have been watching