Simple modals: Present and future
Modal + base form
Examples:
We should invite your friend to my party.
We could buy some soda if you have money.
You might want to call your mom and tell her you are at a friend’s house.
الموديل البسيط هو should . could. might يكون للحاضر والمستقبل
والشرط الكامل او المعقد
Perfect modals: past
Modal + have + past participle
Examples:
You should have called me last night.
Mary should have done her homework this week.
We should not have made a big mess here.
نضيف عليه have ويكون للماضي