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We replace one thing with another, but we substitute one thing for another. The two phrases mean the reverse of each other: You replace gold with paper money. You substitute paper money for gold.
Position not in the negative infinitive immediately before the word to and not after it.
The adjective is open. The past participle is opened: Somebody has opened all the windows.
Use the present infinitive without to, not the past tense after the auxiliary did.
the answer to a question beginning with did is always in the past tense: Did you see the picture? -Yes, I saw the picture; or Yes, I did.