 Welcome to this video. Today, you're going to learn how to correctly use didn't and wasn't. This is a question that a student asked and it's a really important question to understand basic English grammar, so I'm very happy that they asked. Of course, I'm Jennifer from jforisenglish.com and this channel is dedicated to helping you sound like a fluent, confident, natural English speaker. Now, before we go any further, make sure you subscribe and hit that bell icon so you're notified every time I post a new lesson. Now, let's dive in with this video. Today, let's talk about the difference between didn't and wasn't. Both of these are the past simple forms and both of them are past simple negative. Wasn't is the past simple negative form of the verb to be, but wasn't is only used with the subjects I, he, she, and it. Didn't is a past simple negative form, but it's an auxiliary verb, which means it doesn't have a base verb itself. It's used with any base verb. So our sentence structure would be subject. Didn't base verb to form a complete sentence that's past simple negative. To understand both of these, let's start with a positive sentence in the present. So we'll do a present simple positive sentence and then we'll see how we can change that sentence into the past simple negative so you can see the transformation of how we use didn't and wasn't. So let's start with our positive present simple sentence for the verb to be. I'm there. I'm there. Pretty simple, right? To be there. I'm there. Or I could say she's there. Now I can make this sentence negative in the present simple simply by adding not. I'm not there. She isn't there. But remember wasn't is the form of the verb to be and it's negative, but it's used in the past simple. So I need to take my two sentences and have a past simple time reference. So let's use yesterday. Yesterday I know I'm in the past simple and I know that my sentence is going to be negative. So I can say yesterday she wasn't there. Yesterday I wasn't there. So that's how the transformation took place from having a present simple positive to present simple negative to past simple negative. And remember wasn't is only used for the subjects I he she it. So let's do the same thing and see how we can get to didn't. So let's start with the present simple positive sentence. I go to bed at 10 30. So here my verb is go to go. I go to bed at 10 30. Now when we take regular verbs excluding to be to be as a verb has different rules. Okay. So we take regular verbs like the verb go. We have our positive in the present simple to form the negative in the present simple. I need an auxiliary verb. And that auxiliary verb that I'm going to use is don't. I don't go to bed at 10 30. This is the auxiliary verb for the subjects I you we and they I don't go to bed at 10 30. So now I have a negative sentence but it's in the present simple. It talks about a routine but I want to talk about a past simple. So I can use the keyword yesterday. So I know I'm in the past simple yesterday. I didn't go to bed at 10 30. So to form a negative sentence in the past simple for regular verbs we need to follow our structure subject didn't and then our base verb. Our base verb is go. I didn't go to bed at 10 30 yesterday. So remember wasn't is only used with the verb to be and is only used with the verb to be with the subjects I he she it didn't is used for regular verbs in the past simple negative as the auxiliary verb and your sentence structure is subject didn't base verb. That's how you would form complete sentences in the past simple negative. So now is your turn to practice. I want you to leave two examples one with wasn't and one with didn't put them in the comments below and make sure you have a past simple reference. So it could be yesterday but it could be other past simple time references as well. If you found this video helpful please hit the like button share it with your friends and of course subscribe. And in some next time happy studying. All right awesome job with this video pay attention take the time to really understand this because this is basic sentence structure. You need to have this correct before you move on to more advanced grammar topics. So make sure you take the time to perfect this start with the comments leave your comments below to practice wasn't and didn't and I'll see you in my next video bye