Does 那个公共汽车很红 sounds right? A friend told me all adjectives in Chinese are verbs. I am not so sure if it is right in general, especially when it comes to color. I ask him to give me examples and he said
1 天黑了
2 那个公共汽车很红
I think 1 is fine but 2 is not, but I don't how to explain these.
Can someone explain how you interpret the idea that all adjectives in Chinese are verbs and how you can use colors as verbs? thanks
It is not 'all adjectives in Chinese are verbs' but 'many adjectives in Chinese can also function as verbs' and most of the time you need a correct verb particle
Examples:
黑马 - Black horse (O)
天黑了 - The sky has darkened (O)
把墙黑了 -  to darken the wall (X) - the correct verb is 涂黑(to paint black) or 弄黑 (to make black)
瘦狗 - thin dog (O)
這狗瘦了 - This dog has thinned down (O)
瘦自己 - to thin oneself down (X) - the correct verb is 弄瘦 (to make thin)
強人 - strong person (O)
這人強了 - this man has grown strong (O)
強這攻势 - strengthen this attack (X) - the correct verb is 加強 (to strengthen)
攻势弱 - the attack is weak  (O)
攻势弱下來了 - the attack has weakened down (O)
弱他们的攻势 - to weaken their attack (X) - the correct verb is 減弱 (to weaken)

那个公共汽车很红 sounds right?


红(red) here is still an adjective for the noun 公共汽车 (this bus is very red)

红 (short for 火红 = popular and trendy) could function as a verb with an appropriate verb particle


Example:
那种公共汽车最近红了起來 = Recently, that kind of bus has become popular and trendy