a)SEto put your name on a list for something because you want to take part in it 报名
for
I’m thinking of signing up for a yoga course.
我在考虑报名参加一门瑜伽课。
sign up to do something
Over half the people who signed up to do engineering were women.
报名读工程学的人半数以上为女性。
b)WORK FOR somebody sign somebody ↔ up if someone is signed up by an organization, they sign a contract in which they agree to work for that organization 使某人签约受雇,签约雇用某人
Several well-known researchers have been signed up for the project.
有几位著名的研究人员已经签约参加这个项目。
Examples from the Corpus
sign up• Allegre was signed by the New York Jets.• Six episodes of the show have been taped, and the actors have been signed for six more.• The band have just completed a highly successful US tour, and several record companies have offered to sign them up.• England soccerstar Paul Gascoigne was signed up by a topItalianclub.• Gary can't find a job, so he's signed up for UnemploymentTraining.• I signed up to take an artclass just to get out of the house in the evenings.• Did you sign up yet? The course starts in two weeks, you know.
sign up to do something• Unfortunately she had signed up toact in a film two weeks earlier.• As I have already suggested, this interpretation of what Britain signed up to is highly debatable.