How do you say "Let's [do something]" in Irish
I'm sure I should know this. But I just can't remember the construction. Any help please?

Question

How do you say "Let's [do something]" in Irish
I'm sure I should know this.  But I just can't remember the construction.  Any help please?

Answer

You need to use the 1st person plural imperative form of the verb, i.e. the ending -(a)imis/-(a)ímis

E.g. ólaimis "let's drink", ceannaímis é "let's buy it", téimis "let's go", tosaímis "let's begin"