【主題句型】As long as S+V, S+V 只要；和…一樣長
說明：as long as當連接詞使用，表示條件時，解釋為「只要」；表示時間或比較級時，意思是「在…期間、和…一樣長」。
例句3： You can go out, as long as you promise to be back on time. 只要你答應準時回來，你就可以出門。
*請利用as long as將連接此兩句 ”You have to keep my book clean.”、”You can borrow it.”。
i助教建議解答：You can borrow my book as long as you keep it clean. / As long as you keep my book clean, you can borrow it.