试题题干
An English language learner may have learned a rule like the third person singular "-s," but is unable to articulate the correct form in casual and spontaneous conversation because the rule has not yet been （）.
参考答案
正确答案：
试题解析
一个英语学习者可能已经学会了第三人称单数“-s”这样的规则，但由于规则尚未被习得，所以无法在日常和自然的交流中表达出正确的形式。