In Sydney I have lived in Sydney for 8 days. It is too difficult to understand what people say. What should I do? Actually I try to speak and explain English, but I just feel there is no improvement in my English skills. When I talked with someone, I only used expressions which I already know. I think I need some new expressions.... Anyway, I really wish my English skills improved..

On sale I went shopping yesterday. The shop which you used to go was on sale. They had 50% discount. Can I say like this?

Say hello to someone! A: Oh! Hi! Long time no see~ What have you been up to? B: Hello~ I am fine~ How about you? Is your business going well? A: Pretty good~ Yes, We got a big success in a business last month. Where is your husband? B: He is busy these days. He is going to go business trip tomorrow. A: Oh I see, Say hello to your husband! B: Okay~ See you later~ I saw A today. She said say hello to you. I want to know if I can say like this. " She said say hello to you."

I understood wrong! My friends said to me something. But I answered wrongly. A: Oh, really sorry. I understood wrong what you said. or I understood mistake. Can I say like this?