Modal Verbs with 'Have To'

Which modal verb is used with 'have to' to express obligation?

• might

• should

• must

• can

Answer explanation

In the question, we are asked to identify the modal verb that is used with 'have to' to express obligation. The correct choice is 'must', as it is the modal verb that, when combined with 'have to', indicates a strong obligation or necessity.

What is the negative form of 'have to'?

• should not

• don't have to

• must not

• need not

Answer explanation

The negative form of 'have to' is 'don't have to'. This option correctly negates the obligation or necessity expressed by 'have to'. The other options, 'should not', 'must not', and 'need not', do not accurately convey the negative form of 'have to' as they express different levels of obligation or necessity.

Choose the correct sentence that expresses necessity using 'have to':

• a) I have to go to the dentist tomorrow.

• b) I don't have to go to the dentist at all.

• c) I need to go to the dentist next week.

• d) I had to go to the dentist yesterday.

Answer explanation

The correct sentence expressing necessity using 'have to' is 'I have to go to the dentist tomorrow.' This sentence shows a present obligation or necessity to visit the dentist, which is what the question asks for.

Fill in the blank: We _______ wear a uniform to school.

• have to

• can

• should

• might

Answer explanation

The correct choice is 'have to' because it indicates a requirement or obligation. In the context of the question, wearing a uniform to school is a mandatory rule, not just a preference or possibility. The other options ('can', 'should', and 'might') do not convey the same sense of obligation.

True or False: 'Have to' is used to talk about things that are optional.

• False

• Not sure

• Sometimes

• True

Answer explanation

False is the correct answer. 'Have to' is used to express necessity or obligation, not optional actions. When something is optional, it means it's not required or mandatory, which is the opposite of the meaning conveyed by 'have to'.

Which modal verb is used to express strong necessity or obligation?

• might

• could

• should

• have to

Answer explanation

The modal verb 'have to' is used to express strong necessity or obligation. In the given question, the other options, 'might', 'could', and 'should', do not convey the same level of necessity or obligation as 'have to' does.

Choose the correct negative form of 'have to':

• not have to

• don't have to

• didn't have to

• haven't to

Answer explanation

The question asks for the negative form of 'have to'. The correct answer is 'don't have to'. This is because in English, when we want to express the absence of necessity, we use 'don't' before 'have to'. The other options, 'not have to', 'didn't have to', and 'haven't to' are not the correct negative forms of 'have to'.

Fill in the blank: She _______ to finish her homework before going out to play.

• can

• has

• should

• might

Answer explanation

The correct answer is 'has'. In the context of the question, 'She _______ to finish her homework before going out to play', the blank needs to be filled with a verb that indicates a completed action. 'Has' is the appropriate choice as it indicates that she has completed her homework, which is a prerequisite for going out to play.

True or False: 'Have to' is followed by a base form of the verb.

• Only in formal writing

• Sometimes

• True

• False

Answer explanation

The statement 'Have to' is followed by a base form of the verb is true. In English grammar, 'have to' is a modal verb used to express necessity or obligation, and it is always followed by the base form of the verb, regardless of the subject or tense.

Choose the correct sentence that expresses necessity using 'have to':

a) I have to study for the exam.

b) I had to study for the exam.

c) I will have to study for the exam.

• a) I have to study for the exam.

• b) I had to study for the exam.

• c) I will have to study for the exam.

• d) I don't have to study for the exam.

Answer explanation

The question asks for the correct sentence expressing necessity using 'have to'. The correct choice is 'I have to study for the exam.' This sentence is in the present tense, indicating a current obligation or necessity, which is the correct usage of 'have to'.