In 6/4 can I beam by 2/4 + 2/4 + 2/4 or is it strictly 3/4 + 3/4?
And also I didn't find a good explanation of irregular beaming in cases where time signature constantly changing from bar to bar (not alternating but literally changing, e.g., I have four measures, and they're all different in time, e.g., 6/4, 4/4, 5/4, 9/8) in that case, can I beam the 4/4 measure like 1/4 + 1/4 + 1/4 + 1/4 or even 3/4 + 1/4? Especially if it looks more convenient on paper than regular 2/4 + 2/4 and will not distort the entire picture because that bar is one of a kind?