Answer:
The following are example sentences using modals with their corresponding functions.
Explanation:
Shall
According to the handbook, all students shall surrender their identification cards at the end of every school year.
Mother said that you shall attend attend school until you finish college.
The above sentence use the word shall to express an act that is expected to be done. In the case of the first sentence, all students are expected to surrender their IDs while in the second sentence, the mother expects the child to go to school until he/she finishes college. Shall is commonly used when stating rules and laws.
Must
Parents must support their children financially, morally, and spiritually.
You must study hard to pass English.
Must is used to express an act of obligation (see example on parents) or an act that is necessary (just as in studying hard).
Can
Grade-12 students can attend conferences and present their outputs in the subject, Practical Research.
We can pay bills using financial apps on our phones.
The above examples show how the modal verb, can is used to express ability (or what one can do).
