Thank you for your correction!
1. He needs two canned foods.
1-1. He needs two kinds of canned food.
(Are they wrong sentences?)
2. He needs a canned coke to drink.
3. Shall we have some pizza at a MacDonald's.
(Check the sentences, plese.)
4. Shall we ride a bicycle in/on/at the park? (Which preposition do I have to use? Are all OK?)
5. An old couple found two seats in/on the train. (Are both prepositions OK?)
6. A: Did you see my bag? It was here on this seat. B: Your bag? I heard a ticking sound/noise from the bag. I was so scared, so I threw it out the window. A bomb must have been in the bag.
A: A bomb? Oh,no! It was my clock!
(Is the short dialogue grammatical?)
1 is incorrect; 1-1 is perfect.
2 is fine.
3 is OK except for the end -- "...McDonald's?"
4 should be "in the park."
5 should be "on the train." (Don't ask me why!! It's just idiomatic!)
6 is wonderful!! (You can use either "sound" or "noise"; either one works.)
If you are doing a conversation, as you seem to be doing in 6, you might what to put the sentences in quotes. (Essentially, you are quoting what is being said.)
Also a new paragraph is used to indicate changes in ideas, times, places or speakers.
"Did you see my bag? It was here on this seat."
"Your bag? I heard a ticking noise from the bag. I was so scared, so I threw it out the window. A bomb must have been in the bag."
"A bomb? Oh,no! It was my clock!"
I hope this helps a little more. thanks for asking.
1. Both sentences are grammatically correct. In the first sentence, "He needs two canned foods," is a general statement indicating that he requires two unspecified types of canned food. In the second sentence, "He needs two kinds of canned food," specifies that he needs two different types of canned food.
2. The sentence, "He needs a canned coke to drink," is grammatically correct. However, it's worth noting that the more commonly used term is "a can of coke" rather than "a canned coke."
3. The sentence, "Shall we have some pizza at a MacDonald's," has a minor error. Instead of "a MacDonald's," it should be "at McDonald's" (without the indefinite article "a").
4. The correct preposition to use in this sentence is "in." Therefore, "Shall we ride a bicycle in the park?" is the correct sentence.
5. Both prepositions, "in" and "on," can be used in this sentence, but they change the meaning slightly. If the old couple physically sat inside the train itself, you would use "in." However, if they sat on the seats within the train, you would use "on." So, depending on the intended meaning, both prepositions can be correct.
6. The short dialogue is grammatically correct. However, it's important to note that it is a conversation, and it may be helpful to use quotation marks to indicate the speech of each person. For example:
A: "Did you see my bag? It was here on this seat."
B: "Your bag? I heard a ticking sound/noise from the bag. I was so scared, so I threw it out the window. A bomb must have been in the bag."
A: "A bomb? Oh, no! It was my clock!"