Unit 10 Test Modal Verbs

The modal verb "could" is used to describe a past ability to do something. It suggests that the person had the capability or skill to do something in the past, but it does not necessarily mean that they actually did it. "Could" is commonly used to talk about past abilities or skills in English.

We use the modal verb "may" to express that something is possible. "May" indicates that there is a chance or likelihood for something to happen or be true. It suggests that there is a possibility for the situation or event to occur, but it is not certain.

The modal verb "need" is used to explain a need or urgent want. It expresses necessity or obligation, indicating that something is required or necessary to be done.

When we are obliged or required to do something, we use the modal verb "must". "Must" expresses a strong obligation or necessity. It indicates that the action is necessary and there is no alternative. Therefore, "must" is the correct answer in this case.

We use the modal verb "should" to express a moral obligation. This implies that it is the right or proper thing to do in a given situation, based on societal norms or personal beliefs. "Should" indicates a sense of duty or responsibility towards a certain action or behavior, making it the appropriate choice for expressing moral obligations.