I like hamburgers a lot 为什么后面要加 a lot

I like hamburgers a lot 为什么后面要加 a lot a lot后面加什么?比如I have a cat .It like fish ,It eats( 为什么要填a lot I do not like hamburgers ,soda (a lot)对吗? i like you a lot I like Sichuan food a lot.就a lot提问 change后面加a lot 还是much a lot of后面能加doing? I like Sichuan food (a lot) I like books_____computers a lot.介词填空 i do like you a lot是什么意思? i'm a lot like you I like pandas a lot(否定)