My girlfriend says that you should wait 15-20mins before you get a second portion.
before the helping verb
You should use the possessive pronoun your before a gerund. For example, "I appreciate your helping me with this project."
There should be no problem flying before having carpal tunnel syndrome surgery.
You should wait about 24 hours for polyurethane to dry before applying a second coat.
You should let polyurethane dry for about 24 hours before applying a second coat.
Yes, should is a helping verb.
before you do something you should give a second thought.
Should is an auxiliary (helping) verb.
technically there are 24 of them be am is are was were been being has had have could should would may might must shall can will do did does having.
Parnets should be together for maybe two years before having children but if they are ready to have children then they should and when i say ready i mean a steady job good income and a house.
about a couple months after so you can get used to having one