What to do?/

I am making my first sweater that is knitted in pieces…I have made the back and the two fronts and know I am on my first sleeve…however I am a little confused…here is the pattern for the sleeves…
Make two.
With smaller needles, CO 33 sts.
K1, p1 rib for 16 rows (this makes a nice cuff you can turn back to adjust sleeve length as needed).
Change to larger needles.
[U][B]Work 36 rows St st and AT THE SAME TIME inc 1 st each end of Rows 3, 11, and 19 - 39 sts[/B][/U].
Shape Armhole And Cap
BO 4 sts beg next 2 rows.
Purl one row.
Cont in St st and dec 1 st each end next and every 4th row until 7 sts rem as follows:
K1, sl1, psso, work to last 3 sts, K2tog, k1.

Now where is says to to the increase it says rows 3, 11 and 19 - 39 sts…now does that mean that I do an increase on 19 - 39 rows or just those sts??? and if it is just those stst then in what row??? I am a little lost here…please help me so I can finish and put it together and see what it looks like…thank you!!!

Welcome to Knitting Help!

I read it as to increase just on those rows since it tells you what the stitch count is after. You’ll be increasing on either side of the center. I’d do it one stitch in so it’ll be easier to seam.

What Jan said. I think what has you most confused is - [B]39 sts.[/B] which is how many stitches you should have when you finish the row.

When you finish the final row I think.

Yup. That’s better. It does give the row numbers that it applies to. Thanks, Jan!