First we should mark the mistakes in the written work and note in speech,and then we have to check out what mistakes they are and what they should be amended,and the last we need to review these mista...how do the instructorsdeal with the mistakes that appear in learner's speech and written work?can you tell me, 3Q.First we should mark the mistakes in the written work and note in speech,and telll the learners of their mistakes. Then ask and listen to the learners why did they make the mistakes and what did they think when using these wrong expressions. After correcting the mistakes,as instructor,you can ask the learners to make some sentences or write a paper with these correct expressions.Hope this does help you,and will be selected as the best answer!