英语发音

• 协助主要动词构成谓语的词叫助动词（Auxiliary Verb），也叫辅助动词。被协助的动词称作主要动词（Main Verb）。助动词用来构成时态和语态。 助动词具有语法意义，但除情态助动词外没有词汇意义，不可单独作谓语。它没有对应的汉译，例如： He doesn't like English. 他不喜欢英语。（does是助动词，无词义；like是主要动词，有词义）
  He seems to be eating something. 助动词和动名词一起构成谓语，建议插入be
• Fast as you run, you can't catch up to him. 不及物动词后面加介词up（同时catch up也是一个词组）再加宾语。
• What do you like best? 副词（best）修饰动词的位置一般在动词后。
• Only then did I realize I made such a big mistake.否定句中助动词did和动词原形一起构成谓语。
• Don't make up any excuses for being late.介词（for）后面通常需要接动名词，助动词和形容词一起构成系表结构，所以写beling
• be enthusiastic about 对……充满热情： High school students are supposed to be enthusiastic about public services, which will benefit them in the long run.助动词和形容词一起构成系表结构，所以插入be作为助动词，