1
Islikeshouldbutis more formal.
2
Itisanotherformtotalkaboutfuture.
3
Isusedtogiveadvicesorsuggestions.
4
Is a modal thatyou can use totalkabouthypotheticalsituations.
5
Is te past of can.
6
Isusedtotalkaboutfuture, promisses and predictions.
7
We use ittotalkaboutobligation.
8
Isusedtotalkaboutpossibilityorpermission, is more formal than can.
9
Isusedtotalkaboutabilities, alsotoaskpermission in an informal way.
