Spoken Persian: the copula (ـه / ـست)

In formal written Persian, the verb "is" is است. However, in everyday spoken conversation, it shrinks down into a short suffix attached directly to the end of the preceding word.

After a Consonant: است becomes ـه

If the word before "is" ends in a consonant, است becomes the attached suffix ـه.

Formal WrittenSpoken Equivalent
زشت استزشته
نرم استنرمه

After a Vowel: است becomes ـست

If the preceding word ends in a vowel (such as ی, ا, or the vowel ه), است attaches directly as ـست.

Formal WrittenSpoken Equivalent
جدی استجدیست
خجالتی استخجالتیست

Putting It All Together

Notice how the spoken endings shift depending on whether the preceding word ends in a consonant or a vowel: