Infinitival
a. 不定式的
🗣️ 情景例句
you need to work at it, Grandpa.
你得常练它， 爷爷。
All is well that ends well.
结果美满都是好的。
It is not a simple competition for a fixed amount of food determined by the physical environment,
它已不是为了争得物质环境所决定的有限食物而进行的简单竞争了，