suddenly後面一定要加逗號嗎

後面不一定要加逗號，例如：

1、They suddenly became aware of people looking at them.他們突然意識到有些人在瞧著他們。

2、Suddenly it clicked ─ we'd been talking about different people.我們突然領悟到原來我們談論的不是同一個人。

3、It suddenly struck me how we could improve the situation.我一下子明白我們如何能改善局面了。

不一定，但放在句首時一定要加逗號，但放在句中時不一定，如：Robot suddenly moved to another position