5. Before he introduced me to his friend he shook hands with him Before introducing me to his friend, he shook hands with him 6. They hadhad dinner, so they continued their journey Having had dinher, they continued their ourney.5. Before he introduced me to his friend, he shook hands with him. 6. They had had dinner, so they continued their journey. Before introducing me to his friend, he shook hands with him. Having had dinner, they continued their journey