WHO

    * The boy is in the bed.
    * Who is in the bed? The boy is in the bed, or The boy is, or The boy.

HE

    * Is the boy in the bed? Yes, he is.
    * Where is the boy? He is in the bed.

SHE

    * The girl is in the classroom.
    * Who is in the classroom? The girl is in the classroom, or The girl is, or The girl.
    * Is the girl in the classroom? Yes, she is.
    * Where is the girl? She is in the classroom.

THEY

    * The woman and the baby are on the chair.
    * Who are on the chair? The woman and the baby are on the chair, or The woman and the baby are, or The woman and the baby.
    * Is the woman on the chair? Yes, she is.
    * Is the girl on the chair? No, she isn’t.
    * Are the woman and the baby on the chair? Yes, they are.

WHAT

\begin{itemize}
    \item The train is in the station.
    \item What is in the station? The train is in the station, or The train is, or The train.
\end{itemize}

AT}

\begin{itemize}
    \item Is the train in the station? Yes, it is.
    \item Is the ship in the station? No, it isn’t.
    \item Where is the train? It is in the station.
\end{itemize}

\subsection*{WHAT}

\begin{itemize}
    \item What is in the egg-cup? An egg is in the egg-cup, or An egg is, or An egg.
    \item Is the egg in the egg-cup? Yes, it is.
    \item Where is the egg? It is in the egg-cup.
\end{itemize}

\subsection*{WHAT}

\begin{itemize}
    \item What are in the sky? The aeroplanes are in the sky, or The aeroplanes are, or The aeroplanes.
    \item Are the aeroplanes in the sky? Yes, they are.
    \item Where are the aeroplanes? They are in the sky.

   * boy, woman, this, what, a, are, they, etc., are words.

- People and Things

   * These are People: boy, woman, teacher, king, queen, baby, etc.
   * These are Things: table, chair, clock, motor-car, mountain, etc.

- Who and What

   * The word who  is for people.
   * The word what  is for things. But note: Who is he? He is Mr. X. What is he? He is a teacher.

- Gender 

   * The words for males (boy, man, husband, son, king, etc.) are Masculine Gender .
   * The words for females (girl, woman, wife, daughter, queen, etc.) are Feminine Gender.
   * The words for things (table, chair, mountain, clock, etc.) are Neuter Gender.

- Pronouns

   - * he is for masculine gender (singular). 
   
       * e.g. he is a boy; he is a son; he is a king.
   
   - * she is for feminine gender (singular).
   
       * e.g. she is a girl; she is a daughter; she is a queen.
   
   - * it is for neuter gender (singular).
   
       * e.g. it is a train; it is a picture; it is an egg.
   
   - * they is for masculine, feminine and neuter genders (plural).
   
       * e.g. They are boys. They are daughters. They are eggs.