[amp_mcq option1=”Isn’t” option2=”Wasn’t” option3=”Won’t” option4=”Doesn’t” correct=”option3″]
The correct answer is C. Won’t.
The sentence “He probably won’t be back in time for dinner” is a modal verb construction. Modal verbs are used to express possibility, necessity, or permission. In this case, the modal verb “won’t” is used to express the speaker’s belief that it is unlikely that the person will be back in time for dinner.
The other options are not correct because they do not express the same meaning. Option A, “isn’t,” is the negative form of the verb “to be.” It would be used to express the speaker’s belief that the person is not back in time for dinner. Option B, “wasn’t,” is the past tense form of the verb “to be.” It would be used to express the speaker’s belief that the person was not back in time for dinner at some point in the past. Option D, “doesn’t,” is the negative form of the verb “to do.” It would be used to express the speaker’s belief that the person does not do something, not that they are not likely to do something.