How to form adjectives by combining 好 and 难 with verbs
Adjectives formed by combining 好 with verbs
We use 好 
before verbs to form an adjectives with a positive meaning. These adjectives express the pleasantness or ease of performing the action that the verb denotes.
好看
好学
好吃
好喝 (about drinks)
好找
好听
before verbs to form an adjectives with a positive meaning. These adjectives express the pleasantness or ease of performing the action that the verb denotes.
好看
好学
好吃
好喝 (about drinks)
好找
好听 Pay attention
So these adjectives literally express that something is “easy to do” or “good to do”.
Examples
这个苹果很好吃
This apple is delicious
zhè ge píngguǒ hěn hǎochī
你唱得真好听！
You sing very well!
nǐ chàng de zhēn hǎotīng
If these adjectives act as an attributive in the sentence, we should put the particle 的 between them and the noun.
between them and the noun.Examples
小朋友，你们看看这个好玩的小丑！
Children, look at this funny clown!
xiǎopéngyǒu, nǐmen kànkan zhè ge hǎowán de xiǎochǒu
Adjectives formed by combining 难 with verbs
We use 难 before verbs to form adjectives with a negative meaning. These adjectives, on the contrary, denote the unpleasantness or difficulty of performing the action that the verb denotes.
难看
难学 (about a subject of study)
难吃 (about food)
难喝 (about drinks)
难找
难听
before verbs to form adjectives with a negative meaning. These adjectives, on the contrary, denote the unpleasantness or difficulty of performing the action that the verb denotes.
难看
难学 (about a subject of study)
难吃 (about food)
难喝 (about drinks)
难找
难听 Pay attention
So these adjectives literally express that something is “hard to do” or expresses bad a sensory experience when attached to sense verbs.
Examples
在学校读书时我总觉得语言很难学
I always found it hard to learn languages when I was in school
zài xuéxiào dúshū shí wǒ zǒng juéde yǔyán hěn nán xué
那颜色难看得很
That color is very ugly
nà yánsè nánkàn de hěn