3) Co mplete com DO ou D oes. a)He __ not work. b) We __ not study. c) They __ not go. d) She __ not lov e.

## Step 1<br />The problem involves filling in the blanks with the correct form of the auxiliary verb 'do'. The auxiliary verb 'do' is used in the present tense to form negative sentences and questions. The correct form of 'do' depends on the subject of the sentence.<br /><br />## Step 2<br />For the subject 'He', 'She', or 'It', we use 'does'. This is because 'He', 'She', and 'It' are third person singular subjects.<br /><br />## Step 3<br />For the subjects 'We', 'You', 'They', or plural nouns, we use 'do'. This is because 'We', 'You', 'They', and plural nouns are first person plural, second person singular or plural, and third person plural subjects.<br /><br />## Step 4<br />Based on the above rules, we can fill in the blanks in the given sentences.