Only direct speech should go inside inverted commas.

只有直接引语应放在引号内。

This thesis is intended for the study of fictional dialogue in the narrow sense, mainly in the form of direct speech within quotation marks.

本文的研究对象是狭义的“小说对话”，主要表现形式是小说中的直接引语。

Put the direct speech into indirect speech.

把下面的直接引语改为间接引语。

Direct speech is easier than reported speech.

直接引语比间接引语简单。

The indirect speech act is relative to the direct speech act.

间接言语行为是相对于直接言语行为而言的。