The phrase "如果...就..." (rúguǒ...jiù...) in Chinese is equivalent to "if...then..." in English. It is used to introduce a conditional statement, where the result or action depends on the condition being met.

Sentence Structure

• 如果 + Condition + 就 + Result: The condition is introduced by "如果," and the result follows "就."
• "就" can sometimes be omitted in casual speech, but its inclusion makes the connection clearer.

Examples

1. Simple condition:

   • 中文: 如果他今天来，我们就开会。
   • 英文: If he comes today, then we will have the meeting.

2. Describing a possibility:

   • 中文: 如果有时间，我就去看你。
   • 英文: If I have time, I’ll visit you.

3. Explaining a rule:

   • 中文: 如果迟到，就不能进入考场。
   • 英文: If you're late, you won't be allowed to enter the exam room.

认为 (rènwéi)

Meaning: To think, to believe, or to hold the opinion that something is true.
Connotation: It is often used to express a reasoned judgment, opinion, or conclusion based on facts or reasoning.

Usage in Sentences

1. Expressing an opinion or conclusion:

   • 例句: 我认为这个方法很有效。
   • 英文: I think this method is very effective.

2. Implying a reasoned or thoughtful perspective:

   • 例句: 专家认为环境保护非常重要。
   • 英文: Experts believe that environmental protection is very important.

3. Used in formal or objective contexts:

   • 例句: 他认为这个决定对公司有好处。
   • 英文: He believes this decision is beneficial for the company.

以为 (yǐwéi)

Meaning: To think or assume something to be true, often incorrectly.
Connotation: It implies an assumption or belief that might not align with reality, and is often used when the speaker later discovers their assumption was wrong.

Usage in Sentences

1. Describing a mistaken assumption:

   • 例句: 我以为今天是星期二，但其实是星期三。
   • 英文: I thought today was Tuesday, but it’s actually Wednesday.

2. Indicating an expectation that turns out to be incorrect:

   • 例句: 她以为自己能赶上火车，但却迟到了。
   • 英文: She thought she could catch the train, but she was late.

3. Expressing surprise or realization:

   • 例句: 我以为他不会来，结果他还是来了。
   • 英文: I thought he wouldn’t come, but he came after all.