2 Her words puzzled me very much because I did not then understand anything unless I touched it.她的话使我感到非常困惑,因为那时我若不用手触摸就什么都不理解。
(1)unless除非;如果不,引导一个肯定的条件状语从句,从句有时可与if...not引导的否定状语从句互换。
(2)unless引导的条件状语从句常用一般现在时表示将来意义,主句多用一般将来时。
(3)在unless引导的条件状语从句中,主语和部分谓语有时可以省略。
Unless you are trying to lose weight to please yourself,it’s going to be hard to keep your motivation level high.
除非减肥是为了悦己,否则很难保持积极性。
[夯实基础]
(1)I want you to keep working unless I tell you to stop.
I want you to keep working if I don’t tell you to stop.(用if从句改写句子)
(2)要是不能额外弄一些钱,剧院将要关闭。(翻译句子)
Unless some extra money is found,the theatre will close.
3单元语法
——语法填空
(1)There was nothing left of the town.The earthquake of the previous year had destroyed(destroy) it completely.
(2)We were late.When we arrived,the show had started(start).
(3)When the guard had inspected(inspect) the bag,he handed(hand) it back to Mark.
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