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Read the friends' complaints about their disastrous trip. Select ALL the grammatically correct sentences that describe a regret about yesterday's rainy beach trip.
The correct answers are I wish we had checked the weather forecast before leaving. and If only we had brought an umbrella to the beach!
Both "wish" and "if only" require the past perfect tense (had checked, had brought) to talk about things we would like to change about the past. "If only" is often used to make the regret sound slightly stronger or more dramatic!