Please, Check My Essay.

I checked it. Thanks a lot.

Based on what I understood, both can be used. Right? It says sometimes there is a difference in use. I read it but honestly, I still don't get it. I feel that they have the same meaning and the first form, which I used, is much clearer in comparison to the second one, especially with some examples like 'You needn't have washed the dishes'. It sounds confusing and chaotic for me. May you clarify it with the same example to be clearer for me. Do they have the same meaning with a difference usage?

1. Classes need not be disrupted.

2. Classed need not to be disrupted.

Also I'll add,

3. Classes do not need to be disrupted.

Excuse me, I have another question that is relevant. When I think about the affirmative form of the sentence I used, then try to bring the negation. it will be like the following:

1. Classes need to be disrupted. (Affirmative)

2. Classes need not to be disrupted. (Negation)

I wonder about the affirmative form of the sentence you made.

1. Classes need not be disrupted. (Negation)

2. Classes need be disrupted. (Is this correct as affirmative?)

Moreover, what does 'A3' mean in the beginning of your paragraph?

Sorry, I asked a lot.

I appreciate your responses. Thank you very much.