On trouve également le gérondif après les prépositions by et while. Complétez les phrases en utilisant une préposition et un gérondif.
1. He passed his examvery hard. (work)
2. He did his homeworkTV. (watch)
3. They found the way to our houseat their map. (look)
1. He passed his exam by working very hard.
2. He did his homework while watching TV.
3. They found the way to our house by looking at their map.