23. Compare and say: 1) big / small 2) clean / dirty 3) short / long 4) happy / sad. Bob, Mary, Max.

There is not enough information to compare Bob, Mary and Max exactly: we need a picture or facts about them.

You can use these forms:

• big — bigger, small — smaller
• clean — cleaner, dirty — dirtier
• short — shorter, long — longer
• happy — happier, sad — sadder

Example: Bob is bigger than Max. Mary is happier than Bob.

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