I wonder if posible using abreviation in esperanto.

for instance instead of use  "estas,estis,estos,ect" isn't a whole lot better

if just use 'tas,tis,tos " sound more flexible and more manageable.

what do you think?

Hello, Seymore.  I'm not aware of such abreviations, but I am aware of the existance of stative verbs in Esperanto.  All you need to do is attach a verbal suffix to an adjectival root.  For example:

La birdo belas =La birdo estas bela = The bird is beautiful.  -is, -os, etc. can also be used in thsis way, thus eliminating the need for an adjective in the sentence, since the stative verb stands in its place.

 

I hope this helps.

Wow, seymour, I had exactly the same thought to abbreviate est- as 't-... but sadly, things as basic as est- seem to be set in stone.  Besides, the naturalists (ie people who think that an IAL should look like a European language, or at least that all roots should come unmodified from some natural language) wouldn't like it.

From what I've seen, the verb forms of adjectives are not predictable; you can't necessarily add an 's' to an adjective an make a statal verb.  However, statal verbs are the most common type of verb formed from an adjective.