sign up
phrasal verbsign on/up | sign somebody on/up
- to sign a form or contract which says that you agree to do a job or become a soldier; to persuade somebody to sign a form or contract like this
（使）签约受雇（或入伍） - He signed on for five years in the army.
他签了在部队服役五年的合同。 - The company has signed up three top models for the fashion show.
为时装表演，公司签约聘了三名顶尖模特儿。
- He signed on for five years in the army.
sign up (for something)
- to arrange to do a course of study by adding your name to the list of people doing it
报名（参加课程） - You can sign up online for language classes.
你可以在网上报名参加语言课程。
- You can sign up online for language classes.