I am happy. So am I. = I am happy too. I'm going to Brazil in the summer. So am I. = I am going to Brazil too. You look nice today. So do you. = you look nice too. Stephanie has a new boyfriend. So does Mary. = Mary has a new one too. We went to the concert last night. So did I. = I went to the concert too. I would love a coffee right now. So would I. = I would love a coffee too. He will win a prize. So will I. = I will win one too. They have finished their homework. So have I. = I have finished too. I can speak two languages. So can I. = I can speak two too. He should study more. So should I. = I should study more too. We could see the mountains. So could we. = We could see them too. My brother had eaten too much. So had I. = I had eaten too much too.