Callum: The verb and particle have been reversed and put before the subject. Listen again, first, the original.

动词和小品词的位置被调转了并且放到了主语的前面。 再听一次，先来看原始的句子。

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English phrasal verbs are widely believed to be particularly difficult to master because the choice of verb-particle combinations seems so unsystematic.

英语动词短语被广泛地认为难以掌握因为动词和小品词的组合似乎无理可循。

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Therefore, learners find them vital for understanding. However, Verb-particle constructions are difficult and troublesome for learners to master because of its complexity of meanings and structures.

短语动词的组合力强，数量多，使用广，而语义和语法结构又纷繁复杂，一直是英语学习者不易把握的一个词类。

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