Sure, let's go through each sentence and identify the mistakes:

1. **The cat is among the lamp and the bed.**
- **Mistake:** The word "among" is incorrectly used. "Among" is used for more than two items. For two items, "between" should be used.
- **Correction:** The cat is between the lamp and the bed.
- **Corrected Sentence:** The cat is between the lamp and the bed.

2. **There are a cupboard, a dishwasher and a table in the kitchen.**
- **Mistake:** The phrase "There are" is incorrect because it should be "There is" when listing singular items.
- **Correction:** There is a cupboard, a dishwasher, and a table in the kitchen.
- **Corrected Sentence:** There is a cupboard, a dishwasher, and a table in the kitchen.

3. **Is there a television front of the microwave?**
- **Mistake:** The phrase "front of" is incorrect. It should be "in front of."
- **Correction:** Is there a television in front of the microwave?
- **Corrected Sentence:** Is there a television in front of the microwave?

4. **There are two bookshelf in my sister’s bedroom.**
- **Mistake:** The word "bookshelf" should be in its plural form "bookshelves."
- **Correction:** There are two bookshelves in my sister’s bedroom.
- **Corrected Sentence:** There are two bookshelves in my sister’s bedroom.

5. **I can see that there is a vase behind of the light.**
- **Mistake:** The phrase "behind of" is incorrect. It should be just "behind."
- **Correction:** I can see that there is a vase behind the light.
- **Corrected Sentence:** I can see that there is a vase behind the light.

So, the corrected sentences are:

1. The cat is between the lamp and the bed.
2. There is a cupboard, a dishwasher, and a table in the kitchen.
3. Is there a television in front of the microwave?
4. There are two bookshelves in my sister’s bedroom.
5. I can see that there is a vase behind the light.