| 例句 |
signed up (for)verbpast tense of sign up (for) to become a member ofthey both signed up for a Spanish class enlisted (in), enrolled (in), entered, joined, signed on (for) reenlisted(or re-enlisted), reenrolled(or re-enrolled), reentered, rejoined, re-uppedgot in demitted dropped out, quit(also quitted), withdrew |