谁帮我看看有没有什么语法错误?

尽我所能了……我直接给你写了
such as zhongshan park nd lixiang park.
接下来语序有点问题
every morning(不要连着写，没有这个词） there are lots of old man.
Shenzhen is also famous for some sights such asEast OCT , Splendid China Folk Village,...
There are many delicious foods in shenzhen(不能用have）,here you can taste food all over the world(没有from）
Nowadays,you also can buy your friend lots of delicious（拼写错误，上面也是）food(buy sb.sth)
最后一段读不通，感觉每对
The history of shenzhen will help you to understand the city better.

祝你英语水平步步高！！把机会留给我哦~~~

除了前两段全是错的

Shenzhen is a coast city，there are many fine parks，such as zhongshan park，lixiang park。 The park have lots of old men every morning。Shenshen is also famous as a tourist destination such as East OCT,Splendid Folk Village,Window of the world,Happy valley.Shenzhen has lots of dilicious food.Here you can taste the food from all over the world.These days,you also can lots of delicious food for your friends.
Shenzhen has many events everyday and these events will help you understand Shenzhen better.

Shenzhen is a coastal city, with many fine parks ,such as zhongshan park, lixiang park. Every morning, there are a lot of old men in parks. Shenzhen is also a good destination for tourism, where there are many beautiful spots, East OCT, Splendid China Folk Village, Window of the World, Happy Valley, and etc. The food in Shenzhen is also very delicious. The flavor from all over the world can be tasted here. You can still buy it for your friends among there days.
There are also many historic events happened there, which will help you understand more about this beautiful city.