［误］ Please buy a book for me.
［正］ Please buy me a book.
［正］ Please buy a book to me.
［析］ 在接双宾语的动词后面的两个宾语，一个是直接宾语，一个是间接宾语，如：Buy me a book中me是间接宾语，而a book是直接宾语。如果将直接宾语前置，其后应加to，如：Tell me a story. Tell a story to me. Give me a book. Give a book to me.
［误］ He was seen come into the book store.
［正］ He was seen to come into the book store.
［析］ 在主动语态中，有时可以加不带to的不定式作宾语，如：I saw him come into the book store.但如果变为被动语态时，则要将省略的to还原。当然这些动词还可以加动名词作宾语，如： I saw him coming into the book store, 如变为被动语态时，则没有变化。如：He was seen coming into the book store.
［误］ How nice the book is! Is it sold well?
［正］ How nice the book is! Does it sell well?
［析］ 有些动词可以表示一种动作，但也可以用来表示某种性质，表示动作时可用被动语态，在表示性质时则不可用被动语态。如：
This book sells well. 这本书畅销。
This car drives easily. 这车容易驾驶。
These clothes wash easily. 这些衣服好洗。
在作上述表达时，不要用被动语态。而要讲：
This kind of book was sold out. (这种书卖完了)
These clothes were washed by the washing machine. 这时要用被动语态，因为它描述的是具体动作。
［误］ Must I do it now?No. you mustn't.
［正］ Must I do it now?No, you needn't.
［析］ need用在疑问句和否定句中常用作情态动词，其后接不带to的不定式。由must提问的问句作答语时，如是肯定的要用must,否定的要用needn't，即为没有必要。在肯定句中常用作实意动词，如：I need to wait for my boy.
［误］ Is this book yours? Yes, It's.
［正］ Is this book yours? Yes, It is.
［析］ 在肯定的回答中不要用缩写形式，而在否定的回答中可以用缩写形式，如：No. It isn't.
［误］ I'll have my bike repair tomorrow.
［正］ I'll have my bike repaired tomorrow.
［析］ have+人+动词原形或现在分词意为：让某人作某事，如：My father had me to learn how to drive，或My father had me doing my homework from morning till night. have+物+动词的过去分词为某件事被别人完成。如：I have my hair cut.我去理发。而不是自己理发。如果讲我想自己作某事，则用I want to repair my bike myself.
［误］ I'll get my brother repair the bike for you.
［正］ I'll get my brother to repair the bike for you.
［析］ have与get的用法有相同之处，也有不同之处。相同之处，如：have something done, 也可用get something done, 或have (get) somebody doing something但不同之处在于have somebody do something 在用get时则要用get somebody to do something。
［误］ I have to study on Saturday but I haven't to study a full day
［正］ I have to study on Saturday， but I don't have to study a full day.
［析］ have to 不得不，而don't have to 为其否定式。
［误］ Is Tom in the classroom? No. He mustn't be in the classroom, because I saw him talking with our teacher in the office just now.
［正］ Is Tom in the classroom? No. He can't be in the classroom because I saw him talking with our teacher in the office just now.
［析］ must 加动词原形表达一种比较肯定的推测，而表示否定的推测则要用can't。
［误］ My grandpa is over eighty but he is able to read without glasses.
［正］ My grandpa is over eighty， but he can read without glasses.
［析］ can (could) 多用于表达客观的事实，主观能力，而be able to 则多用于表达主观的意愿。
［误］ She doesn't answer the doorbell. She should be asleep.
［正］ She doesn't answer the doorbell. She must be asleep
［析］ should 用于现在时态的句子中应译为"应该"，如：You should do your homework right away. 而 must加动词原形表示一种推测。
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