This document discusses different ways to express wishes and regrets in English using modal verbs and verb tenses. It outlines four main structures: 1) "Wish + past simple" to express a present wish about a situation, such as "I wish I knew the answer." 2) "Wish + person/thing + would" to talk about things we want to happen or stop, like annoying habits. 3) "Wish + past perfect" to express regret about the past, like "I wish you had told me the truth." 4) "Should/shouldn't have + past participle" to also express regret about the past, for example "I should have recharged my phone