permit的用法和辨析

　　But, in American English, "permit" is more common in sentences about official rules, such as in signs and handbooks that state what you are not permitted to do.

　　And, like "allow," we use the infinitive form for main verbs with "permit." Listen for the infinitives in these examples:

　　Her parents do not permit her to eat beef.

　　The city does not permit pets to ride the Metro.

　　The zoo does not permit visitors to feed the animals.

　　Again, for official rules, we often use passive voice. Let's hear two of the examples as passive:

　　Pets are not permitted to ride the Metro.

　　Visitors are not permitted to feed the animals.

　　Imagine these as public signs. Most public signs are not complete sentences. What you often will see is very short wording, such as "smoking not permitted."

　　It is important to note that not all sentences with "let" "allow" and "permit" follow the causative sentence structure.

　　Well, I hope you enjoyed letting me tell you all about these causative verbs today.

　　I'm Alice Bryant.

　　Alice Bryant wrote this story for Learning English. Caty Weaver was the editor.

　　Now, you try it! Practice using today's causative verbs. Read the instructions below and do the exercises.

　　Exercise 1

　　During today's program, I asked you to make a note of the meanings in the example sentences. Which sentences were about giving permission? Which were about making something possible? Write your answers in the comments area.

　　Exercise 2

　　Answer the following questions in complete sentences. Be sure to use causative sentence structure. You can use the table below as a guide. Write your answers in the comments area.

　　Example:

　　Question: Does your job let you take a lunch break?

　　Answer: Yes, my job lets me take a lunch break.

　　(Or) No, my job does not let me take a lunch break.

　　Did the changes permit you to have more free time?

　　Will you let me pay for dinner tonight?

　　Does the museum allow visitors to take pictures?

　　Do your parents allow you to drive their car?

　　Should we let the dog run around the park?

　　Does your school permit students to eat in class?

　　subject

　　causative verb

　　object

　　main verb

　　The warm days

　　let

　　us

　　enjoy...

　　Her parents

　　(do not) allow

　　her

　　to eat...

　　The zoo

　　(does not) permit

　　visitors

　　to feed...

　　Words in This Story

　　informal - adj. not suited for serious or official speech and writing

　　formal - adj. suitable for serious or official speech and writing

　　negative - adj. referring to a word or statement that means "no" or that expresses a denial or refusal

　　mention - v. to talk about, write about or refer to something or someone, especially in a brief way

　　handbook - n. a small book of instruction or guidance on a subject

　　pet - n. an animal, such as a dog, cat, bird, or fish, that people keep mainly for pleasure

permit后接动词的用法规律

　　Time doesn't permit my waiting longer. 时间不允许我等得太久。

　　The rules of the club do not permit smoking. 这个俱乐部规定不准吸烟。

　　若其后先接宾语再跟动词则要用不定式

　　His health does not permit him to come. 他的健康(状况)不允许他来。

　　Her father would not permit her to eat sweets. 她父亲不允许她吃糖果。

　　比较下面两句

　　We don't permit smoking in the lecture room. 我们不允许在大教室抽烟。

　　We don't permit people to smoke in the lecture room. 我们不允许人们在大教室抽烟。