were, we're

Were or were ( pronounced wurr ) is the past tense (yesterday, or some time ago ) of "to be", used with we, you, or  they --
They were going out for tacos.
We were going out for tacos.
You were going out for tacos.
We were going out for tacos when it began to rain. 
We were hungry.
Were is also used with , he she or it when there is an "if" or condition in the sentence. --
If I were going out for tacos, I would buy a lot of them.

We're or we're ( pronounced weer ) is a short, informal form (contraction) of  "we are"--
We're going out for tacos.
We're hungry.

Now that you know that, you can say--
"We're hungry, so we're eating the tacos we were saving for later."

Note--Not to be confused with "weir" ( rhymes with we're ), meaning a small dam or fence in a stream--
The water flowed  over the weir with a rushing sound.
Note # 2--"weird" ( pronounced weerd ) means odd, strange, or unusual.--
He likes to watch weird old movies.
Note # 3--"whirr" ( rhymes with were ) means  the sound something might make when spinning--
The whirr of the fan made it difficult to concentrate.