我勉强能用意大利语进行对话。

I can just about ___hold ___a ___conversation in Italian.

我懂语法和许多不同的表达方式，并且能与人进行对话。

I know the grammar and many different expressions, and I can ___hold ___a ___conversation with other people.

他能够就哲学等复杂话题进行对话。

He is able to ___hold ___a ___conversation on complex topics like philosophy.