用It is+adj.+of/for+sb.+(not)to do sth.的句型翻译句子

1. It' very imprudent of him to make a decision without explanation.
2. It's very necessary for English learners to take part in role-play actively in the classroom.

1.他很轻率，没有解释什么就做出了决定
It's so rashly of him to make the dicision without any explain.
2.在课堂上积极参与到角色扮演中对英语学习者是很必要的
It is necessary for English learner to be active in the class role-playing !!