Can you please check these two sentences?

1) He contrasts natural behaviour, which he regards as good to social behaviour, which was governed by reason and social conventions.
2) Long, low-neck T-shirts, which reach up to the tighs, are very popular among teenagers.
3) Can you say "I would want to" in English? Does it mean "I would like to"? Can you give me examples?

Thank you.

Read and compare VERY CAREFULLY to catch the punctuation (and one spelling) corrections:

1) He contrasts natural behaviour, which he regards as good, to social behaviour, which he considers to be governed by reason and social conventions.

2) Long, low-neck T-shirts which reach down to the thighs are very popular among teenagers.

3) Can you say "I would want to" in English? Does it mean "I would like to"? Can you give me examples?

Yes, that's its meaning. Usually people will use a contraction, so it sounds like how they convey this thought in speech.

I'd like to...
I want to...
I wish I could...

1) The sentence appears to be grammatically correct. It is a statement about someone's view on contrasting natural behavior with social behavior. However, it would be helpful to know the context and purpose of the sentence to provide a more comprehensive assessment.

2) The sentence contains an error. "Tighs" should be spelled as "thighs" to refer to the upper part of the leg. Once this correction is made, the sentence is grammatically correct. It states that long, low-neck T-shirts that reach up to the thighs are very popular among teenagers.

3) Yes, "I would want to" is a valid phrase in English. It is often used to express a desire or preference for doing something. It is similar in meaning to "I would like to." Here are a few examples:

- "If I had the opportunity, I would want to travel the world."
- "I would want to try that new restaurant everyone's been talking about."
- "In my free time, I would want to read books and relax."

These examples show how the phrase "I would want to" can be used to express personal desires or preferences.