Formula's tenses.

+ Simple present

I / we / you / they work, write

he / she / it works, writes

+ Present continuous

I am working, am writing

he / she / it is working, is writing

we / you / they are working, are writing

+ Present perfect

I / we / you / they have worked, have written

he / she / it has worked, has written

+ Present perfect continuous

I / we / you / they have been working, have been writing

he / she / it has been working, has been writing

+ Simple past

I / he / she / it / we / you / they worked, wrote

+ Past continuous

I / he / she / it was working, was writing

we / you / they were working, were writing

Past perfect

I / he / she / it / we / you / they had worked, had written

Past perfect continuous

I / he / she / it / we / you / they had been working, had been writing

+ Simple future

I / he / she / it / we / you / they will work, will write

Future continuous

I / he / she / it / we / you / they will be working, will be writing

Future perfect

I / he / she / it / we / you / they will have worked, will have written

Future perfect continuous

I / he / she / it / we / you / they will have been working, will have been writing

Nicolas Kreutzer