It can be clearly seen from the figure that the number of post test students doing questions has increased significantly in general, but the effect of questions 10-16 is not so obvious. The number of the correct people in the post test is lower than that in the pre test or there is no change. The reason for the decrease of the accuracy is that the use of the simple strokes in this part is not clear enough, and the students do not really master the component analysis of the relative pronouns. Or compared with the simple strokes, other teaching methods and teaching methods are more suitable for this part of the explanation. However, it does not prove that the use of Jane's strokes in these parts of the explanation is useless. However, the gap between the pre-test and the post test of 7-8 questions is very large, which proves that students' understanding and application ability of present continuous tense and past continuous tense can be improved.
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