1. Each one of us has his room.

2. Each one of us has her room.
3. Each one of us has its room.

(Is Only #1 correct? What about the others?)

4. Move the chair to the front of the class.

5. Move the chair on the front of the class.

6. Move the chair in the front of the class.

7. Move the chair in front of the class.

(Are the four the same and grammatical? Do they have differences in meaning?)

1. Note "his" room so that is either we are all males OR one male has a room that we should not have.

2. Same idea except now we are either all female OR one female has a room that we should not have.

3. "its' implies that the room belongs to, perhaps, a family pet.

4. good

5. "on" the front - no

6. ok = in the front area

7. now the entire class is "behind" the chair.

Sra

1. Each one of us has his room.

In this sentence, "his" is used as a gender-neutral pronoun, referring to each person in the group. This sentence is correct.

2. Each one of us has her room.
In this sentence, "her" is used as a gender-specific pronoun, referring to each person in the group as female. This sentence is correct if the group consists only of females.

3. Each one of us has its room.
In this sentence, "its" is used as a gender-neutral pronoun, referring to each person in the group. However, using "its" to refer to people is not considered grammatically correct. Instead, it is better to use "his" (if the group contains only males or a mix of males and females) or "his or her" (if the group contains males and females).

4. Move the chair to the front of the class.
This sentence is grammatically correct. It indicates that you should place the chair in the area at the front of the class.

5. Move the chair on the front of the class.
This sentence is not grammatically correct. Instead of using "on," it should be "to." So the corrected sentence is: "Move the chair to the front of the class." This means the chair should be placed in the area at the front of the class.

6. Move the chair in the front of the class.
This sentence is technically grammatically correct, but it does not convey the intended meaning. It suggests placing the chair inside the area at the front of the class, which may not make sense. It is better to use "to" instead of "in," resulting in the sentence: "Move the chair to the front of the class."

7. Move the chair in front of the class.
This sentence is grammatically correct. It implies that you should place the chair outside the area at the front of the class, facing the class.