guess

Compared meaning: to think something is probably true (verb).

比较义项：对不确定的事情表达看法、猜测或认定（动词）。

• suppose

  Expresses a cautious assumption based on reasoning, often with lingering doubt or a note of resignation; common in polite or slightly formal hedges like 'I suppose so'.

  表示基于推理做出的谨慎推测，往往还带着一丝疑虑或无奈的语气，常用于像“我想是吧”这样略显客套或正式的委婉说法中。

  I suppose you're right, though I still have my doubts.

  我想你是对的，不过我心里还是有些疑虑。

• think

  The neutral, everyday verb for stating a personal opinion without indicating how strong or certain the speaker feels; works in almost any context.

  是表达个人看法时最中性、最常用的动词，并不表明说话人有多确定或多强烈，几乎适用于任何场合。

  I think the meeting starts at ten, but I'm not completely sure.

  我认为会议是十点开始，不过我不是完全确定。

• believe

  Shows strong conviction or trust that something is true, often because the speaker trusts the source or has faith in it, not just a passing impression.

  表示强烈的确信或信任，认为某事是真的，往往是因为说话人信任消息来源或对此深信不疑，而不只是一时的印象。

  I believe every word she told me, because she never lies.

  我相信她说的每一句话，因为她从不撒谎。

• guess 本词

  Expresses low confidence or a casual, resigned assumption, sometimes made without real evidence; common in informal speech, especially American English.

  表示信心不足、较随意甚至无奈的猜测，有时并没有真正的依据，常见于非正式口语，尤其是美式英语。

  I guess we're stuck here until the storm passes.

  我猜我们得在这儿等到暴风雨过去了。

Suppose, think, believe and guess all mean thinking something is probably true, but confidence differs. Suppose shows a cautious assumption. Think is the neutral, everyday word for an opinion. Believe shows strong conviction. Guess shows low confidence, a casual assumption. Believe can mean 'religious faith'.

这四个词在猜测或认定某事为真时意思相近，但确定程度和语气不同：guess最随意、最不确定，suppose带一点推测加无奈或客套的语气，think最中性平常，believe语气最强，强调信任或确信。这里不比较believe“信奉、笃信（宗教或主张）”的意思，也不比较guess作名词“猜测”的用法。

Compared meaning: to think or guess something is true (verb).

比较义项：认为，猜想（动词）。

• think

  The most neutral and common way to state a belief or opinion, with no strong sense of guessing; used in almost any context, formal or casual.

  最中性、最常用的表达信念或看法的方式，没有明显的“猜测”意味，几乎适用于任何正式或非正式场合。

  I think Monday works best for the meeting, but let's double check.

  我认为周一开会最合适，不过我们还是再确认一下吧。

• guess 本词

  Suggests forming an idea with little or no evidence, often a rough estimate; common in casual speech, especially American English.

  表示在证据很少甚至没有证据的情况下形成的想法，往往是粗略的估计；常用于非正式口语，尤其是美式英语。

  I guess it's around three o'clock, since I don't have my phone.

  我猜大概是三点钟吧，因为我没带手机。

• imagine

  Implies picturing or inferring something based on reasoning or general knowledge, often about future or hypothetical situations; slightly more thoughtful in tone.

  暗示是基于推理或常识去构想、推断出某种看法，常用于对未来或假设情形的推测，语气略显经过思考。

  I imagine ticket prices will rise again before the holidays.

  我料想假期前票价还会再涨。

• suppose

  Implies a reasoned assumption, often with a mild, sometimes reluctant tone; common in British English, as in 'I suppose so'.

  暗示一种经过推理得出的假设，常带有一丝无奈或让步的语气；常见于英式英语，如“I suppose so”。

  I suppose the shop is closed already, since it's after nine.

  我猜想这家店应该已经关门了，因为都过九点了。

All four mean to believe something without being certain. Think is neutral and common. Guess means an idea with little evidence. Imagine means a view from reasoning, often about the future. Suppose means a reasoned assumption. Excludes: think 'reflect', guess 'guess right', imagine 'picture, fantasize'.

这几个词在“认为、猜想”这一义项上意思相近，但确定程度和语气不同：think最中性、最常用；guess强调凭很少证据做出的推测；imagine强调基于推理或想象得出的看法；suppose则常带有一丝无奈或让步的语气。这里不比较think的“思考、思索”义、guess的“猜对、猜中”义，以及imagine的“想象出画面、幻想”义。