Question

Choose the word or phrase that best completes the sentence.

You're 18!You're _________ to be able to look after yourself by now.

• A. have
• B. ought
• C. should
• D. supposed

Answer 1

The correct option is D supposed

Option D: 'Supposed to' means 'to have to', 'a duty or responsibility'. It is relevant to the given sentence. 'It is your responsibility to look after yourself by now'.

Hence option D is correct.

Options A, B and C: 'Have to', 'ought to' and 'should' all refer to obligation an duty. But their forms are not correct in this sentence.

'Ought to' and 'have to' are not preceded by the auxiliary verb 'are' ('are' in 'you are' or 'you're'). 'Ought to' and 'have to' are semi-modal verbs. They express mood but are in infinitive form 'to'.

'Should' is not a semi-modal, but a modal verb. Hence it won't be followed by 'to', nor be preceded by 'are'.

So options A, B and C are wrong.