There is a bare infinitive in the sentence You must abide by the school rules and regulations..

猜你喜欢

• Over 70,000 people are seriously injured every year in road（）.Traffic regulations should always be obeyed at any time.
• In drug production, a series of laws and regulations like GMP should be obeyed.
• The security regulations of Manchester Airport are not changed from time to time.
• Every country has specific regulations on the items to be carried in and out of the country.