如果…，(+ Subject) + 就… - Expressing "if…, then…" with "rúguǒ…， jiù…" (the subject always appears before 就 but can also be omitted)
山东滨州一家健身房办了一个特别的活动：如果有人能在三个月里减肥超过100斤，就能得到一辆保时捷汽车。
如果30个人参加，健身房就可以收到30万元，但是一辆二手保时捷差不多30多万。

Verb / Adj. + 起来 - Expressed after verbs or adjectives to indicate the beginning and continuation of an action or state with "Verb / Adj. + qǐlái"
这个活动很快在网上火了起来。

然后… - Expressing "after / after that / afterwards…" with "ránhòu…" (describes a certain time period in the past to the present)
健身房说，参加活动的人要先给一万元，然后在健身房锻炼3个月。

Number + 多 - Expressing a number in excess with "Number + duō"
如果30个人参加，健身房就可以收到30万元，但是一辆二手保时捷差不多30多万。
每天减一斤多，不但对身体不好，而且还会非常危险。

Subject + 几乎 + Verb / Verb Phrase - Expressing "almost / nearly..." with "Subject + jī​hū + Verb" (used to emphasise that sb or sth 'almost' meets a certain standard or is close to doing something)
三个月减100斤几乎是不可能的。

即使…，(也)… - Expressing "even if…, still..." with "jíshǐ...，(yě)..." (used to introduce and then disregard a hypothetical statement)
即使真的有人减了100斤，健身房也能赚到钱。

而且… - Expressing "in addition / furthermore…" with "érqiě…"
而且，这种活动能让更多人来健身房健身。

Subject + 让 + Sb / Sth + Verb / Verb Phrase - Expressing "to make or let sb / sth to do sth" with "Subject + ràng + sb / sth + Verb / Verb Phrase" (causative verb)
而且，这种活动能让更多人来健身房健身。

这么 + Adj. - Expressing "so / so much…" with "zhè​me + Adj."
但是医生告诉大家，这么快的减肥会影响健康。

不但…，而且… - Expressing "not only…, but also..." with "bùdàn...，érqiě…"
每天减一斤多，不但对身体不好，而且还会非常危险。

对 + Object + Verb / Verb Phrase / Adj. - Expressing the action is "to" or "towards" an object or target "duì + Object + Verb / Verb Phrase / Adj."
天减一斤多，不但对身体不好，而且还会非常危险。

Characters of an adjective repeated (one after another) - Expressing greater emphasis similar to adding "extremely / really / so" before the adjective (sometimes similar to adding "-ly" onto the end of an adj.)
减肥应该慢慢来，要吃得健康，还要多运动。