the forms of the infinitives

Форми інфінітивів на прикладі дієслова to write:

to write — to have written — to be writing —
to have been writing — to be written — to have been written

1. to write — the simple infinitive;
2. to have written — the perfect infinitive
3. to be writing — the continuous infinitive;
4. to have been writing — the perfect continuous infinitive;
5. to be written — the passive infinitive;
6. to have been written — the perfect passive infinitive
.