有人认为浪费时间没有必要。
Grammar & Usage
How it works
This is a declarative sentence structured as "有人 (some people) + 认为 (think/believe) + [subordinate clause]". The subordinate clause "浪费时间没有必要" means "wasting time is unnecessary," with "浪费时间" (to waste time) acting as the subject of the clause and "没有必要" (is unnecessary) as the predicate. The overall structure conveys a common opinion or belief.
Sample sentences
有人认为学习外语很困难，但我认为只要努力就能学好。
Some people think learning a foreign language is very difficult, but I believe that as long as you work hard, you can learn it well.
他觉得周末加班没有必要，应该好好休息。
He thinks working overtime on weekends is unnecessary; one should rest well.
有人认为做饭很麻烦，但也有人享受烹饪的乐趣。
Some people think cooking is troublesome, but others enjoy the fun of cooking.
Quick facts
Mnemonic
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Example
有人认为学习外语很困难，但我认为只要努力就能学好。
Some people think learning a foreign language is very difficult, but I believe that as long as you work hard, you can learn it well.
他觉得周末加班没有必要，应该好好休息。
He thinks working overtime on weekends is unnecessary; one should rest well.
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