5 Add the prefixes un-, in-, il-, ir- and im- to these words to make negative adjectives. Complete the sentences with the adjectives. There are two extra words.

5. Negative Adjectives

Correct words and their negative forms:

• correct - incorrect
• formal - informal
• happy - unhappy
• legal - illegal
• possible - impossible
• regular - irregular
• visible - invisible

Sentences:

1. Designers have invented clothes that can make you invisible. If you wear them, no one can see you!
2. I must memorise my list of irregular verbs for tomorrow's test.
3. Lots of people download films but they forget that it's impossible. You can get into trouble with the police.
4. He says he can speak 25 languages but I don't believe him. That's unbelievable! (Note: 'unbelievable' is not in the list of given words, but fits the context and follows the pattern of adding 'un-' prefix. Assuming a typo in the question or provided words, using 'unbelievable' as a fitting adjective. If restricted to given words, no perfect fit exists.)
5. I was a little unhappy with my marks in the exam because I know I can do better.

Ответ: 1. invisible, 2. irregular, 3. impossible, 4. unbelievable, 5. unhappy