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Help the busy employee politely decline her friend's weekend trip invitation. Select ALL the grammatically correct sentences she could use to express her regrets.
The correct answers are I wish I could join you for the trip tomorrow. and I wish I didn't have to work all weekend.
To talk about a desire for a future ability or possibility, we use wish + could. To express a wish about a scheduled future obligation, we use wish + past simple (didn't have to). We do not use "can" or present simple ("don't have to") after "wish" for hypothetical situations.