The document discusses various conditional structures used to express hypothetical meanings and wishes in English: 1. Wish + past simple expresses wishes that have not come true or may come true in the future. 2. Wish + would and could refer to general future wishes. Wish + would also expresses wishes for other people. 3. Wish + past perfect refers to things one regrets from the past. "If only" expresses stronger feelings and is used to criticize others. 4. "It's time" uses past simple to say an action should have been done. "Would rather" expresses preferences. 5. "Suppose" uses various verb forms to describe hypothetical situations. "As if" implications