knitting sweater

Hello thanks to accept me :slight_smile: I’m speaking french and my english pattern says …Putleft front and back shoulders on US 6s .RSs facing knit or crochet together .Did someone can help me please .Thanks a lot

Welcome to the forum!
It may be that the patterns wants the shoulders joined with 3-needle bind off. Here’s a video:

Can you tell us the name of your pattern?