English uses several devices to highlight key information: emphatic do/does/did (I DO care), fronting (moving an element to sentence-initial position: On the table lay the answer), and cleft sentences (It was the rain that ruined it / What I need is time). These structures are common in formal writing, speeches, and literary prose.
The emphatic auxiliary do/does/did adds stress or contrast to an affirmative sentence. Choose the correct emphatic form.