pen

I write with a pen.

私はペンで書きます

I write with a blue pen.

私は青いペンで書きます

I write with a blue pen in the classroom.

私は教室で青いペンで書きます

I write with a blue pen in the classroom on weekends.

私は週末に、教室で青いペンで書きます

I write with a blue pen in the classroom on weekends with my teacher.

私は先生と週末に、教室で青いペンで書きます