Those boys are in my class vs These boys are in my class

Examples:

• Those boys are in my class, but I don't know their names.
• I saw those boys in my class at the park yesterday.
• Do you remember those boys in my class who won the science fair?
• Those boys are in my class, but they sit at the back of the room.
• I need to talk to those boys in my class about the upcoming project.

Alternatives:

• The boys in my class are those.
• The boys in my class are the ones over there.
• The boys in my class are the ones I mentioned earlier.
• The boys in my class are the ones with the red backpacks.
• The boys in my class are the ones who play soccer.

Examples:

• These boys are in my class, and they are very friendly.
• I need to talk to these boys in my class about their grades.
• These boys are in my class, and they always sit in the front row.
• Can you help these boys in my class with their homework?
• I know these boys in my class very well.

Alternatives:

• The boys in my class are these.
• The boys in my class are the ones right here.
• The boys in my class are the ones in front of me.
• The boys in my class are the ones I'm pointing to.
• The boys in my class are the ones who like to read.