Subject + 感到/觉得 + 紧张
The adjective 紧张 (jǐnzhāng) means "nervous" or "tense" and describes a state of anxiety or unease. It is often used with degree adverbs like 十分 or 很, as in 十分紧张 (extremely nervous). It can describe both people and situations.
他第一次上台演讲,十分紧张。
Tā dì yī cì shàngtái yǎnjiǎng, shífēn jǐnzhāng.
It was his first time giving a speech on stage, and he was very nervous.
考试之前她总是很紧张。
Kǎoshì zhīqián tā zǒngshì hěn jǐnzhāng.
She is always very nervous before exams.
别紧张,放轻松,你一定能做好的。
Bié jǐnzhāng, fàng qīngsōng, nǐ yīdìng néng zuò hǎo de.
Don't be nervous, relax, you can definitely do it.