一些 + Noun - Expressing "some / a few…" with "yìxiē + Noun" (yīxiē is pronounced yìxiē due to a tone change rule)
在中国，一些公厕现在不给免费厕纸了。

New Situation + 了 - Expressing that there is a change of state or that the action has just happened "now" with "New Situation + le"
在中国，一些公厕现在不给免费厕纸了。
有些人会去那里拿走很多纸，后面来的人想用纸的时候就没有了。

Subject + 想 + Verb (+ Object) - Expressing "would like to" with "Subject + xiǎng + Verb (+ Object)" (negative formed with 不想)
你想用纸的时候，要扫码看广告；你不想看，就要花0.5元买。
有些人会去那里拿走很多纸，后面来的人想用纸的时候就没有了。

Subject + 要 + Verb / Verb Phrase - Expressing that the subject "needs to do sth" with "Subject + yào + Verb / Verb Phrase"
你想用纸的时候，要扫码看广告；你不想看，就要花0.5元买。

Situation + 就 + Verb / Verb Phrase - Expressing "then / and so / in that case…" with "Situation + jiù + Verb / Verb Phrase" (the action happens "as a consequence of / following on from" the situation)
你想用纸的时候，要扫码看广告；你不想看，就要花0.5元买。

Subject + 都 + Verb / Verb Phrase - Expressing "all / every" to emphasise the quantity with "Subject + dōu + Verb / Verb Phrase" (都 emphasises the quantity or frequent occurrence)
在中国，很多公厕都是不要钱的。

Subject + 要 + Noun - Expressing "to want something" with "Subject + yào + Noun" (negative formed with 不要)
在中国，很多公厕都是不要钱的。

有些 + Noun - Expressing "some..." with "yǒuxiē + Noun"
有些人会去那里拿走很多纸，后面来的人想用纸的时候就没有了。

Subject + 会 + Verb / Adverb - Expressing that sth "will" happen or that sb "will" do sth with "Subject + huì + Verb / Adverb"
有些人会去那里拿走很多纸，后面来的人想用纸的时候就没有了。

Verb / Adverb / Phrase + 的 + Noun - Expressed to link a noun to a preceding verb or phrase with "Verb / Adverb / Phrase + de + Noun"
有些人会去那里拿走很多纸，后面来的人想用纸的时候就没有了。