# 1คำตอบสั้นRonaldo plays football in many countries.Football is played in many countries by Ronaldo.Football is played by Ronaldo in many countries.คำใบ้S + is/am/are + V.3 + (relative) + by + O
# 2คำตอบสั้นThis director makes many movies in Hollywood.Many movies are made in Hollywood by this director.Many movies are made by this director in Hollywood.คำใบ้S + is/am/are + V3 + (relative) + by + O
# 3คำตอบสั้นI borrow some books to read.Some books are borrowed to read by me.Some books are borrowed by me to read.คำใบ้S + is/am/are + V3 + (relative) + by + O
# 4คำตอบสั้นThe worker cleans our office every day.Our office is cleaned every day by the worker.Our office is cleaned by the worker every day.คำใบ้S + is/am/are + V3 + (relative) + by + O