"It is / would be better to do sth" 是一个英语表达，用于建议或主张某事比其他选择更优。这个结构强调了做某事相对于其他行动或不做某事而言有更大的好处。它在口语和书面语中都很常见，特别是在提供意见、提出建议或者进行比较时。

### 用法

1. **基本结构**：

   - "It is better to do sth" 用于现在的情况，表示当前的情况中，做某事是更好的选择。

   - "It would be better to do sth" 用于假设或未来的情况，表示如果采取某种行动，结果会更好。

2. **比较级形式**：

   - 这个表达通常与比较级连用，比如 "better"，表示相比于其他选项，建议的行为更优。

3. **否定形式**：

   - "It is / would be better not to do sth" 表示不做某事是更好的选择。

4. **同义句型**：

   - "It's advisable / more advantageous / more sensible to do sth"

   - "Doing sth is more beneficial / preferable"

### 例句

1. **现在情况**：

   - It is better to study regularly than to cram before exams. (定期学习比考前突击更好。)

   - It is better to apologize when you're wrong. (犯错时最好道歉。)

2. **假设或未来情况**：

   - It would be better to start saving early for your retirement. (早点开始为退休储蓄会更好。)

   - If you have a problem, it would be better to talk about it than to keep it to yourself. (有问题的话，说出来比憋在心里好。)

3. **否定形式**：

   - It is better not to eat too much junk food. (最好不要吃太多垃圾食品。)

   - It would be better not to ignore the warning signs of a health issue. (忽视健康问题的警告信号不是明智之举。)

### 同义词辨析

- **Advantageous**: 更强调有利的、有益的，常用于正式场合。

   - It is advantageous to learn a second language.

   

- **Beneficial**: 强调对某人或某事有积极的影响。

   - Regular exercise is beneficial to your overall health.

- **Preferable**: 指更可取的，倾向于个人喜好或主观判断。

   - It is preferable to travel by train rather than by bus.

- **Sensible**: 意味着理智的、明智的，侧重于理性决策。

   - It is sensible to have a backup plan in case of emergencies.