确实
Meaning
确实 is an adverb confirming that a fact, situation or statement really is the case. It conveys the speaker's certainty: “indeed”, “really”, “truly”.
Basic structure
确实 + Verb / Adjective
确实是 + Noun
确实很好
他确实很聪明
这确实是一个问题
Confirming a fact
确实 stresses that the situation genuinely holds — the speaker is confirming, not guessing.
爱情确实是结婚的重要原因，但仅有爱情是不够的
Confirming what someone said
好几年没见，你还是这么爱开玩笑，我哪儿有你说的那么年轻
我说的是真的，你确实比以前更年轻、更漂亮了
Common expressions
确实不错 — really rather good 确实很重要 — genuinely important 确实存在 — really does exist 确实是这样 — that is indeed so
他确实很努力
这确实是个好办法
Remember:
确实 = indeed, really.
It confirms that something is true.
It precedes a verb or adjective; before a noun use 确实是.