1. What kinds of stick food are there on Wangfujing street?

2. What kinds of stick foods are there on Wangfujing street?
3. What kind of stick food are there on Wangfujing street?
4. What kind of stick food is there on Wangfujing street?

5. What kinds of street food are there on Wangfujing street?
6. What kinds of street food are there on Wangfujing street?
7. What kind of street food are there on Wangfujing street?
8. What kind of stick food is there on Wangfujing street?
--------------------------------------
Which expressions do we have to use? Kind or kinds? Food or foods?

The word "food" is a non-count noun, so 1, 4, 5, 6, and 8 are grammatically correct (although I don't think the sentences with "kind" make much sense).

Use "kinds" and "food" ~~~> What kinds of ___ food are _____

Okay. Thank you.

To answer your questions, let's look at the expressions used:

1. "What kinds of stick food are there on Wangfujing street?" - Here, we use "kinds" because we are referring to multiple types or varieties of stick food.

2. "What kinds of stick foods are there on Wangfujing street?" - Similarly, we use "kinds" since we are asking about multiple types of stick food.

3. "What kind of stick food are there on Wangfujing street?" - In this sentence, the noun and verb do not agree in number. The correct usage would be "What kind of stick food is there on Wangfujing street?" Here, we use "kind" because we are referring to a single unspecified type of stick food.

4. "What kind of stick food is there on Wangfujing street?" - This is the correct version of the question, using "kind" to refer to a singular type of stick food.

5. "What kinds of street food are there on Wangfujing street?" - Here, we use "kinds" because we are asking about multiple types or varieties of street food.

6. "What kinds of street foods are there on Wangfujing street?" - Again, "kinds" is used to refer to multiple types of street food.

7. "What kind of street food are there on Wangfujing street?" - Similar to the previous question, the noun and verb do not agree in number. It should be "What kind of street food is there on Wangfujing street?" The singular form "kind" is used to refer to a single unspecified type of street food.

8. "What kind of stick food is there on Wangfujing street?" - This is the correct version of the question, using "kind" to refer to a singular type of stick food.

In summary, when referring to multiple types or varieties of food, we use "kinds" and when referring to a single unspecified type, we use "kind." Both "food" and "foods" can be used interchangeably in these questions.