“突然”在英语中可以表示“unexpectedly”（出乎意料地），或者作为副词使用，表示一个事件或行为突然发生，而没有提前的警告或预兆。
以下是一些例句，帮助您更好地理解和运用“突然”这个词：
1. 突然的事件（Sudden Events）:
The storm hit suddenly, catching everyone off guard.
（暴风雨突然袭来，所有人都措手不及。）
She received the news of her promotion suddenly, and it took a moment for the information to sink in.
（她突然得知了自己被提升的消息，需要一些时间来消化这个信息。）
2. 突然的改变（Abrupt Changes）:
The weather can change suddenly in this region, so it's always a good idea to carry an umbrella.
（这个地区的天气变化常常很突然，所以随身携带伞是个不错的主意。）
He decided to quit his job suddenly, surprising his colleagues and family members.
（他突然决定辞掉工作，让同事和家人都感到惊讶。）
3. 突然的决定（Sudden Decisions）:
They decided to get married suddenly, after only knowing each other for a few months.
（他们突然决定结婚，仅仅相识几个月就做出了这个决定。）
I made a sudden decision to travel abroad, and it turned out to be one of the best experiences of my life.
（我突然决定出国旅行，结果这成为了我一生中最棒的经历之一。）
4. 突然的噪音（Sudden Noises）:
The sudden loud noise startled the children, and they ran inside the house for safety.
（突然的巨大噪音吓到了孩子们，他们跑进房子里寻找安全。）
A sudden crash was heard from the kitchen, making everyone rush to see what had happened.
（厨房传来一声突然的撞击声，所有人都赶紧去看发生了什么事。）
5. 突然的感觉（Sudden Sensations）:
She felt a sudden rush of adrenaline as she prepared to jump from the airplane.
（当她准备从飞机上跳下时，突然感到一股肾上腺素飙升的感觉。）
A sudden wave of sadness washed over him as he remembered his childhood pet that had passed away.
（当他想起已故的童年宠物时，突然涌上心头的是一阵悲伤。）