动名词(V-ing)作名词，不定式(To V)作名词/目的状语。 Gerunds (Nouns) vs. Infinitives (Nouns/Adverbs of Purpose).
掌握核心动词结构：如 Enjoy + Doing, Decide + To Do。 Master patterns: e.g., Enjoy + Doing; Decide + To Do.
分词作为形容词或状语 (如：Seeing the police, he ran)。 Use Present/Past Participles as adjectives or adverbs.
区分 V-ing 和 To V 结构的差异 (Stop doing vs. Stop to do)。 Distinguish meaning: 'V-ing' vs. 'To V' (e.g., Stop doing vs. Stop to do).
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