en_tn/exo/27/16.md

The courtyard gate must be a curtain twenty cubits long

This could be stated as a command. AT: "You must make a curtain twenty cubits long to be the courtyard gate"

The curtain must be made ... fine twined linen, the work of an embroiderer

This can be stated in active form. AT: "They must make the curtain ... fine twined linen, the work of an embroiderer" or "Embroiderers must make the curtain ... fine twined linen" (See: rc://en/ta/man/translate/figs-activepassive)

blue, purple, and scarlet material and fine twined linen

Possible meanings are 1) "yarn that is dyed blue, purple, and scarlet," probably wool yarn, or 2) "blue, purple, and scarlet dye" to dye the linen.

an embroiderer

a person who sews designs into cloth