As I understand for X不Y and X得Y forms, the full tone is optional and dependent on fluidity of speech. Can we allow tolerance for these, e.g. for 忍不住
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Thanks for the report, it should definitely be ren3bu5zhu4
as the primary pronunciation for the simplified course, with ren3bu4zhu4
being accepted as a secondary one. The change will go out in the next update .
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