Please, proofread several sentences.

[Sandersru]

1-If you changed into the suit, we could go to the restaurant
2- If we are hungry we would go to the canteen
3- If the waitress didn’t see us, we would have to wait for some time.
4- If I knew what had been there in your fridge, I could tell what to buy.
5- If that girl had a good taste, she would always be well-dressed.

1.2-I wish I could help them
2.2-I wish the guests were sorry they had made so much noise that the police came
3.2-I wish you could have tasted my cake, it was delicious.
4.2-I wish you were with us.

If we reserved a table in the coffee shop yesterday, we would not have to wait so long now.
If you will have a free time after your work, drop into a fish store and buy some shrimps.

[Searching for language]

1-If you changed into the suit, we could go to the restaurant
2- If we are hungry we could go to the canteen
3- If the waitress didn’t see us, we would have to wait for some time.
4- If I knew what had been there in your fridge, I could tell you what to buy.
5- If that girl had good taste, she would always be well-dressed.

1.2-I wish I could help them
2.2-I wish the guests were sorry they had made so much noise that the police came
3.2-I wish you could have tasted my cake, it was delicious.
4.2-I wish you were with us.

If we had reserved a table in the coffee shop yesterday, we would not have to wait so long now.
If you will have a some free time after your work, drop into a fish seafood?? store and buy some shrimps.

I don't know if a "fish" store would sell shrimp. In Canada we call it a seafood store.

I am not a teacher.

[Sandersru]

Thank you so much for helping me. Yeah, you are right, “seafood store” sounds better.
Here some more sentences. I have translated it but I’m not sure about tenses sequence. Could someone be so kind to proofread them too, are they all correct?
And thanks again.

3- Now I regret I haven’t ordered trout fillet because my roast beef is not cooked. (not fried enough).
4-Jane would buy the shoes if they matched the color of her new stripped skirt.
5- If she had not been on a diet, she would order spaghetti with tomato sauce but she had to order salad and boiled fish.
6- I wish I didn’t wear woolen sweater, it’s cold in here.
7- I wish the cook could put more salt in the meal, it would be tastier.
8- If I had enough money now, I could purchase this elegant spotted two-piece dress.
9- It’s petty we have no time to visit a coffee shop, I would love to have a cup of tea with confectionary. ( or I wish we had more time to visit a……….)
10 If Jack buys milk and a dozen of eggs, I will bake pancakes

[Charlie Bernstein]

1-If you changed into a [or your] suit, we could go to the restaurant.
2- If we were hungry, we would [or we'd] go to the canteen.
3- If the waitress didn’t see us, we will [or we'll] have to wait for some time.
4- If I knew what had been there in your fridge, I could tell what to buy. √
5- If that girl had a good taste, she would always be well-dressed. √

1.2-I wish I could help them.
2.2-I wish the guests were sorry they had [or they'd] made so much noise that the police came.
3.2-I wish you could have tasted my cake. It was delicious.
4.2-I wish you were with us. √

If we reserved a table in the coffee shop yesterday, we would not have to wait so long now. √
If you xxx have xxx free time after xxx work, drop into a fish store and buy some shrimp.

These are difficult. You're doing well!