“动词原形”用英语怎么表达?

问题描述:

“动词原形”用英语怎么表达?
“原形”呢?用英语怎么表达?

原形: basic form 如 write
不定式:infinitive 如 to write
过去式:past tense 或 preterite如 wrote
过去分词:past participle 如 written
现在分词:present participle 如 writing