官公署
I go to the government office.
私は官公署へ行きます
I go to the government office to change my address.
私は住所変更のため、官公署へ行きます
I go to the government office with my mother to change my address.
私は住所変更のため、母と官公署へ行きます
I go to the government office with my mother in the morning to change my address.
私は住所変更のため、母と午前に官公署へ行きます
I go to the government office with my mother by bus in the morning to change my address.
私は住所変更のため、母と午前にバスで官公署へ行きます