4. Mettez les verbes des propositions de temps à la forme en ing.
Exemple: After he immigrated to the United States, he started his own business. → After immigrating to the United States, he started his own business.
a. After they were held in detention for 4 months, the illegal immigrants were released.
→ After ., the illegal immigrants were released.
b. Before he emigrated to the United States, he lived in the Philippines.
→ Before ., he lived in the Philippines.
c. They were arrested by the police while they were crossing the border.
→ They were arrested by the police while ..