'Am', 'is', 'are', 'was' and 'were' are the finite forms of 'be'; 'being' and 'been' are the non-finite forms.
am、is、are、was和were是be的限定形式;being和been是非限定形式。
《牛津词典》
2
The research scope of this thesis is the distribution features of non-finite verbs in the function system of sentence components.
本文的研究内容是非限定动词在各构句成分功能系统内的分布特征。
3
A comparative analysis of non-finite verbal forms is made between the English and the Russian language, with their similarities and differences pointed out.