Anonymous He tied the knot until it could not be (become) any tighter. You can use either one. be often substitutes for become , and it is more idiomatic in this sentence.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousHe tied the knot until it could not be (become) any tighter.You can use either one. be often substitutes for become, and it is more idiomatic in this sentence. I would choose be. Even more idiomatic: He tied the knot as tight as he could.