Can you tell me if all my verbs are correct?

Not one of the ushers knows where the lounge is.
Mumps is a common childhood disease that causes swelling in glands in the neck.
Politics is always a popular subject both to debate and to study at college.
The team is on a winning streak.
Carol, as well as Ines, writes a weekly column for the East High Record.
"Beauty and the Beast" is a folk tale that exist in many different cultures.
Ten pounds is too much weighdt for a young child to carrying a backpack.
It is difficult to concentrate when there are radios and stereos blasting away.
Have either of you read the book or seen the movie version of To Kill a Mockingbird?
In most situation comedies, there is a very wise character, a very foolish character, and a very lovable character.

"Beauty and the Beast" is a folk tale that exists in many different cultures.

Ten pounds is too much weighdt for a young child to carry</b a backpack.

The rest of your verbs are correct.

Here are the corrections for the verbs in each of the sentences you provided:

1. Not one of the ushers knows where the lounge is.
2. Mumps is a common childhood disease that causes swelling in glands in the neck. (verb "causes" is correct)
3. Politics is always a popular subject both to debate and to study at college. (verb "is" is correct)
4. The team is on a winning streak. (verb "is" is correct)
5. Carol, as well as Ines, writes a weekly column for the East High Record. (verb "writes" is correct)
6. "Beauty and the Beast" is a folk tale that exists in many different cultures. (verb "exists" should be plural form "exist")
7. Ten pounds is too much weight for a young child to carry a backpack. (verb "carry" should be in the plural form "carrying")
8. It is difficult to concentrate when radios and stereos are blasting away. (verb "are" is correct)
9. Have either of you read the book or seen the movie version of To Kill a Mockingbird? (verb "have read" is correct)
10. In most situation comedies, there is a very wise character, a very foolish character, and a very lovable character. (verb "is" is correct)

To check if the verbs in the sentences are correct, we need to analyze the subject-verb agreement. Let's go through each sentence:

1. "Not one of the ushers knows where the lounge is."
The verb "knows" agrees with the subject "one" since it is talking about a single person. This verb is correct.

2. "Mumps is a common childhood disease that causes swelling in glands in the neck."
The verb "is" agrees with the subject "mumps" since it is a singular noun. This verb is correct.

3. "Politics is always a popular subject both to debate and to study at college."
The verb "is" agrees with the subject "politics" since it is a singular noun. This verb is correct.

4. "The team is on a winning streak."
The verb "is" agrees with the subject "team" since it is a collective noun referring to a singular unit. This verb is correct.

5. "Carol, as well as Ines, writes a weekly column for the East High Record."
The verb "writes" agrees with the subject "Carol" since it is the main subject of the sentence. This verb is incorrect. It should be "write" to agree with the compound subject "Carol, as well as Ines." The correct sentence would be: "Carol, as well as Ines, write a weekly column for the East High Record."

6. ""Beauty and the Beast" is a folk tale that exist in many different cultures."
The verb "exist" should be "exists" to agree with the singular subject "tale." The correct sentence would be: ""Beauty and the Beast" is a folk tale that exists in many different cultures."

7. "Ten pounds is too much weighdt for a young child to carrying a backpack."
The verb "carrying" should be "carry" to agree with the infinitive verb form. The correct sentence would be: "Ten pounds is too much weighdt for a young child to carry in a backpack."

8. "It is difficult to concentrate when there are radios and stereos blasting away."
The verb "are" agrees with the subject "radios and stereos" since it refers to more than one item. This verb is correct.

9. "Have either of you read the book or seen the movie version of To Kill a Mockingbird?"
The verb "have" agrees with the subject "either of you" since it refers to multiple people. This verb is correct.

10. "In most situation comedies, there is a very wise character, a very foolish character, and a very lovable character."
The verb "is" agrees with the subject "there" since it is a singular pronoun being used as a dummy subject. This verb is correct.

In summary, sentences 1, 2, 3, 4, 8, 9, and 10 have correct verbs. Sentences 5, 6, and 7 need corrections in the verb forms.