continue

続ける

• continue a certain state, condition, or activity
• continue talking; he continued,
• keep or maintain in unaltered condition; cause to remain or last
• allow to remain in a place or position or maintain a property or feature
• do something repeatedly and showing no intention to stop
• exist over a prolonged period of time

進む

• move ahead; travel onward in time or space

広がる

• span an interval of distance, space or time