Sumus (*)

Latin: First person plural present active indicative of sum ("to be"); "we are".

http://en.wiktionary.org/wiki/sumus

Latin Verbs: Esse (to Be)
I am: sum
I was: eram
I will be: erō
you are : es
you were: erās
you will be: eris
he / she / it is: est
he / she / it was : erat
he / she / it will be: erit
we are : sumus
we were: erāmus
we will be: erimus
you (pl.) are: estis
you (pl.) were: erātis
you (pl.) will be: eritis
they are: sunt
they were: erant
they will be: erunt

http://www.slu.edu/colleges/AS/languages/classical/latin/tchmat/grammar/vb/00200%20v-%20to%20be.pdf