Question

Fill in the blank with a suitable modal:
"My friend is getting married."
"I think you ________ go to the wedding."

• A. should
• B. have to
• C. can
• D. may

Answer 1

The correct option is A should

Answer : A

Modal verbs are auxiliary verbs that are used to express necessity or possibility.

Let's take a look at the usage of the modal verbs in the options:

• should : It is used for expressing an opinion / advice / expectation / criticism about some past action or it can be used to ask for an advice
• have to : It is used to express an external obligation in positive sentences and removing an external obligation (or necessity) in the negative sentences
• can : It is used to express an ability or lack of an ability / to give permission or express a prohibition / to make an informal request / to express a general possibility (only with positive verb) / to make a negative deduction
• may : It is used to ask or give or refuse a permission / to express a possibility

Here in the question, we see that the speaker is expressing his opinion that the other person should go to the wedding.

• As it is an opinion and NOT a necessity or an obligation -- "have to" is NOT suitable.
• "can" is NOT suitable as it is NOT used to express an opinion.
• As it is an opinion and NOT a permission -- "may" is NOT suitable.

Therefore from among the options, 'should' is the most suitable verb to complete the sentence.

Thus, the correct complete sentence is:

"I think you SHOULD go to the wedding."