Question

we keep our environment clean use a semi modal verb​

Answer 1

We ought to keep our environment clean.

• ‘Ought to’ is the appropriate semi-modal to be used here.
• Modals are helping verbs that help in adding more details to a sentence. Modals include words like must, should, could, would, etc.
• Semi-modals are a combination of a modal and the preposition ‘to’. Therefore, ‘ought to’ is a semi-modal.
• The blank can be filled with modals like ‘should’ and ‘must’ too, but the question requires a semi-modal.

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