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So, when expressing if you agree with something or if you disagree with something in the past,

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it's just the same as you do in the present, but you change the auxiliary verb to past simple tense.

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So, again, first thing you do is you look and see if the statement that was presented to you

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that you either agree with or you do not agree with, if that statement was positive

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or if it was negative. If the statement is positive, we're using the verb to do.

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Then instead of I do with the positive present, it's past. So it's positive past. I did. Instead

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of do, it's did. I did. If you didn't, but the statement says you did, then you go to the

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negative of this positive statement. This positive statement being I did, the negative being I didn't

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or I did not. This is just short for this. So if you agree with this positive statement

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that you did. I did all my homework already. I did help my mom cook dinner yesterday.

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If you want to agree with this statement, this positive statement that you did something,

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you would say so did I or I did too. If you want to agree with the negative that you didn't or you

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did not. If you want to agree with this negative statement you need another negative. So you would

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say, neither did I. This goes from being two who did to one who didn't and you, so two who didn't.

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So two to zero. If you want to disagree with a positive statement, you need a negative.

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So if you want to disagree with I did, you simply go to I didn't or I did not.

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If the statement is that I didn't or I did not, but you in fact did,

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then you just need to go from the negative to the positive statement and simply from I didn't to I did.

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And when we are using the verb to be, it's again the exact same as the present, except for the auxiliary verb is in past simple tense.

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It says instead of present simple, it's past simple.

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So, I was.

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Past simple of to be.

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I was.

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Positive.

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I was.

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Yes, I was. Negative to be. I wasn't. I was not. I was, but I wasn't. I wasn't, but I was.

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It's the opposite. This is the positive statement and this is the negative statement.

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so if you want to agree with this positive statement I was okay so I was at the party

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were you if you also were at the party you would say so was I or you can say I was too

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if you want to agree with the negative statement that I wasn't at the party.

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I was not at the party.

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Remember, it's a negative statement and you're agreeing with it.

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So you need to use another negative.

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So you say, neither was I.

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Neither or neither.

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Either way is correct for pronunciation.

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Neither or neither.

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so neither was i this person wasn't at the party i wasn't at the party and you weren't at the party

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so neither was i this goes from two to one because this one wasn't to zero because this one wasn't

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either and again if you want to disagree with this positive statement that i was i was at the party

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but if you weren't at the party I was but you want to disagree with my positive statement

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you need to go over to the negative so then you would simply say I wasn't or I was not I was but

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I wasn't or I was not and the same goes for the other direction if this statement is presented

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to you i wasn't or i was not this is a negative statement because it has not in there so if you

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want to disagree i wasn't at the party but you were so the statement says that this person wasn't

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So you're, but you were, so you're disagreeing with the statement.

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So then you would simply go over to the positive of the negative and use that.

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I was, I wasn't, but I was.