discontinued

grammar · medium

易错句子I bought a discontinue product at half price.

正确表达I bought a discontinued product at half price.

修饰名词时要用形容词 discontinued，它由过去分词转化而来；汉语“停产的产品”没有任何词形变化，学习者容易直接把动词原形 discontinue 放到名词前。改为过去分词形式后，词性和句法位置才与形容词定语一致。

grammar · medium

易错句子This camera has discontinued, so parts are hard to find.

正确表达This camera has been discontinued, so parts are hard to find.

discontinue 是及物动词，相机是“被停产”的对象，必须用被动语态 has been discontinued；汉语“这款相机已经停产了”用主动形式表达被动意义，学习者因此常漏掉 be 动词，把 discontinued 当成不及物动词。

grammar · medium

易错句子I got these shoes at a discontinued price during the sale.

正确表达I got these shoes at a discounted price during the sale.

表示“打折的、降价的”要用 discounted（源自 discount 打折），discontinued 只表示“停产、停止销售”，与价格是否优惠无关。两词都以 disc- 开头、都常见于购物场景，学习者容易混用；换成 discounted 才与“促销、便宜价”的语境相符。