Adjective predicates and degree adverbs
Way back in lesson 2 you learned that Mandarin adjectives don't take 是. Instead of 'I am tired', it's just 我很累. That 很 isn't really 'very' — it's the default placeholder that holds the slot of 'is'. Take it out and a bare 我累 sounds either incomplete or contrastive ('I'M tired [but you're not]'). This lesson zooms in on that slot. Different adverbs swap in for 很 to dial the intensity up or down: 真 (really, with feeling), 太 ... 了 (too much), 非常 (very, with weight), 最 (most), 比较 (relatively / comparatively). Each one has its own register and pattern — and 很 is the bland default whenever you don't want any of those flavors.
Recap: no 是 with adjectives
Adjectives stand alone as their own predicate. 我累。 is grammatical but feels half-finished or contrastive. 我很累。 is the default 'I'm tired'. 她很高。 这本书很好。 中文很难。 Adding 是 is wrong: 我是累 is a beginner mistake. The pattern is subject + (degree adverb) + adjective — the degree adverb is required in plain statements, optional under 比 comparisons (lesson 14) and questions (你累吗? — no 很). One thing to note: under 不 negation, 很 drops naturally: 我不累 is fine, 我不很累 sounds weird.
很 vs. 真 — neutral vs. emotional
很 is neutral, default, polite. 她很漂亮。 = She's pretty. (Stating a fact.) 真 zhēn = 'really, truly' — the same word as 真的 (lesson 13). It carries genuine feeling: 她真漂亮! = She's really pretty! / Wow, she's pretty! Use 真 when you mean it emotionally: 真好! = That's great! 真累。 = Wow, I'm beat. Try not to overuse 真 — it loses its punch if every sentence has it. 很 stays the safe default for written and formal speech.
太 ... 了 — 'too' (excessively)
太 tài = too much / excessively. The pattern almost always wraps with sentence-final 了: 太 + adj + 了. 太贵了! = (It's) too expensive! 太难了。 = It's too hard. 她太忙了。 = She's too busy. The 了 is part of the construction — leaving it off (太贵) sounds incomplete in everyday speech. 太 ... 了 can also mean 'extremely, wonderfully' with positive adjectives: 太好了! = That's great! / Awesome! Context (and tone) decides whether you mean 'excessively' or 'wonderfully'.
非常 / 最 / 比较 — heavy, top, relative
非常 fēicháng = very, with weight. Stronger and slightly more formal than 很. 她非常聪明。 = She's extremely smart. 这个非常重要。 = This is very important. 最 zuì = most (lesson 14, refresher). 她最高。 = She's the tallest. 我最喜欢咖啡。 = I like coffee best. 比较 bǐjiào = comparatively, relatively, kind of. Useful when you want to soften a claim: 这本书比较难。 = This book is kind of hard / on the harder side. (Compare 这本书很难 = it's hard, full stop.) 比较 does NOT need a second item — it's the 'relatively-speaking' adverb on its own.
Putting them in order, weakest to strongest
Roughly: 不太 (not very) < 比较 (kind of) < 很 (default, mildly affirmative) < 真 (really) < 非常 (very, with weight) < 太...了 (too / extremely). Examples on one adjective: 不太累 = not very tired. 比较累 = kind of tired. 很累 = tired. 真累。 = really tired (with feeling). 非常累。 = extremely tired. 太累了! = too tired / I'm wiped! All sit in the same slot before the adjective. None of them take 是, none of them stack with 了 except 太 (which requires it). Mixing 了 with the others — 她很高了 — would mean the lesson-11 'change of state' (she's gotten tall now), not 'she is very tall'.
