Ninety-nine percent of the time, you’ll use “used to,” not “use to.”

The following sentences are examples of how “used to” is often used:

So what about the 1%? When is “use to” acceptable?

Of course, if that sentence sounds awkward to you, it can also be written as “I use these two pencils to write and draw.”

Here’s another instance in which “use to” is acceptable, albeit not stellar:

• Didn’t we use to be married? (After “did,” “didn’t,” “were,” and “weren’t,” i.e., past tense verbs.)