estimate : 通常指由个人作出的主观估价。
- Government sources estimate a long-term 50 percent increase in rail fares.
- They estimate (that) the journey will take at least two weeks.
- It was difficult to estimate how many trees had been destroyed.
appraise : 指以专家身份作了最终精确的估价。
- At the end of each teaching practice, trainee teachers are asked to appraise their own performance.
- In cooperation with other professionals, social workers will appraise the individual's needs.
- He coolly appraised the situation, deciding which person would be most likely to succeed.
assess : 原义指对为确定交多少税而估计，引申指通过估价以便更好利用。
- The insurers will need to assess the flood damage.
- They assessed the cost of the flood damage at £2,500.
- Exams are not the only means of assessing a student's ability.
- It's too early to assess the long-term consequences of the two countries' union.
- We need to assess whether the project is worth doing.
- It's impossible to evaluate these results without knowing more about the research methods employed.
- We shall need to evaluate how the new material stands up to wear and tear.
value : 侧重指一般人对某物的价值或价格所作的估计。
- He valued the painting at $2,000.
- The insurance company said I should have my jewellery valued.
rate : 专指评定价值等级的高低。
- How do you rate him as a football player?
- She is rated very highly by the people she works for.
- "What do you think of her as a singer?" "I don't really rate her (= I do not think that she is very good)."
- I rate cars as one of the worst polluters of the environment.
- On a scale of one to ten, I'd rate his book a five.
- Traffic accidents are so frequent that they don't rate a mention (= are not considered to be worth reporting) in the newspaper unless a lot of people are killed.