Найдите в предложении герундий и обусловьте его функцию: What is the

Найдите в предложении герундий и определите его функцию: What is the purpose of going there? Whats the purpose of his going there?Im grateful for his helping me. Im grateful for his having helped me.We inform you of the banks crediting your account with the sum of 100.We inform you of crediting your account with the sum of 100.We thank you for sending us your catalogues