people tend to need less sleep as they get older屬於什麼英語句型?

題目：

people tend to need less sleep as they get older屬於什麼英語句型?

解答：

本句爲主謂賓+狀語句型
主語 people
謂語 tend
賓語 to need less sleep
狀語 as they get older
隨著年齡的增長,人們需要的睡眠會少一些.
供參考.