subject + wish + subject + past formUse a past form after wish to show that the present reality is different from what you want.
Use wish + a past form to talk about a present situation you want to be different now. Use could for missing ability or possibility now.
subject + wish + subject + past formUse a past form after wish to show that the present reality is different from what you want.
subject + wish + subject + could + base verbUse could when the missing thing is ability or possibility in the present.
I wish I knew the answer.
For a present situation you want to change, use wish + past form.
Maria is tired now, so she says, I wish I weren’t so tired. The real situation is true now, and she wants a different present.
Tom cannot swim, and he wants that ability now: I wish I could swim. Use could, not can.
Lisa lives far from work, so she says, I wish I lived closer to the office. She is talking about her situation now.
Not here. After wish, the past form often shows an unreal present, not real past time.
Wish expresses regret about an unreal situation. For polite wants, use would like. For real possible results, use hope.
WISH_PAST_FOR_PRESENTw5Use wish when the real situation is true now, but you want it to be different now. The verb after wish moves to a past form: I wish I knew the answer.
WERE_FOR_ALL_SUBJECTS_AFTER_WISHw4After wish, use were to imagine a different present state: I wish I were taller. This form is common in careful written and spoken English.
COULD_FOR_MISSING_ABILITY_NOWw5Use could after wish when you want a present ability or possibility to be different: I wish I could drive. Do not use can here.
USE_WISH_FOR_PRESENT_REGRETw3Use wish to show that a present situation is not the way you want it to be now: Tom is busy, and Anna says, I wish Tom were free.
NOT_FOR_REAL_POSSIBLE_PLANSw4Do not use wish when you mean a real future plan or a polite request. Use hope for possible future results and would like for polite wants.