I think I __________ have failed the test, but I'm not sure. 

What modal is used tentatively to ask permission or to express a polite request?

A modal that expresses a strong assertion or intention.

The modal "should" is used to indicate obligation, duty, or correctness, typically when criticizing someone's actions.

Classify the following words according to their categories. 

Match the following modals to their functions. 

Arrange the parts of plot. 

Arrange the following words to make a complete sentence.