bow, bough, bow, beau

Bow or bow, when pronounced to rhyme with "go" means a decorative or looped knot made in a string or ribbon--
She tried hard to make the bow on the package look pretty.
If you tie your shoelaces in a bow, you'll be able to untie them easily.

Beau or beau ( rhymes with go ) is an old-fashioned word for boyfriend or suitor--
Her grandmother was so old-fashioned that she still asked after her beau.
They had been seen together many times; everyone assumed he was her beau.

Bow or bow, when pronounced to rhyme with "now", means a bend at the waist, to show submission to authority, or thanks, as to an audience--
In England, it is still the custom to bow to the queen.
The audience cheered when he came onstage to take another bow.
Bow may also mean to bend one's neck, usually called to "bow the head"--
On Sunday, he would bow his head through the entire service.

Bough or bough ( rhymes with now ) means a small branch of a tree--
"When the bough breaks, the cradle will fall..."
They tied decorations to each bough of the tree.

Now that you know that, you can say--
"Her beau greeted her with a bow, and held out a bough of holly tied with a red bow."

Note--"bow" ( rhymes with go ) is also the arched piece of wood used to shoot an arrow or play a stringed instrument--
Robin Hood was famous for his skill with a bow and arrow.
Rosin up the bow and play us a tune.
Note # 2--"bow" ( rhymes with "now" ) also means the forward part of a ship--
The ship ran aground and the bow hit the pier.