Add frequent suffix strokes for grammatical endings and word formation.

Keep the root stable, add the suffix cleanly, and read the final translation for spelling changes.

练习输入: -ing, -ed, -er, -ly, -ment, -tion

目标: 97.00% 准确率 和 38.00 WPM.

Common Suffixes Guided Practice: working tested faster clearly movement action careful useful kindness development

Common Suffixes Review: Morning light moved slowly across the valley, revealing carefully planted fields and workers preparing equipment for construction.