The past is identified by "fa".

The present is identified by "fi".

The future is identified by "fo".

The conditional is identified by "fu", plus fa/fi/fo where needed.

These tense markers may be placed at any sensible place in the sentence, depending on what you want to express.

Example:(And that day,) my friend fa goes shopping ≠ fa my friend goes shopping
the second sentence could mean they’re not your friend anymore.

They can also be used to indicate what something will be or used to be like.

Example

I fi visit the house i fa white.
Here, we understand the house used to be white.

<Fa you> loves this film = the former you loves this film.