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Past continuous: was/were + V-ing describes an action in progress at a past time. Past simple can interrupt it: While Grandma was cooking, I arrived. Wish + past simple expresses an unreal present wish: I wish I knew the recipe. With be, were is a standard form for all subjects in wishes.
/m/ is made with lips together and a nasal voice, as in memory. /l/ uses the tongue near the ridge behind the upper teeth, as in lesson. Keep the final /l/ in school audible without adding a new syllable.