Say, say, say, tell me the difference and what preposition to add, whether it is necessary to add a preposition and how to use it.

The key to the distinction lies in understanding whether these verbs are transitive or intransitive in nature, and the preposition collocation after intransitive verbs:

Transitive verbs emphasize the content of speech; You can't use prepositions directly with.

Speak is usually used as an intransitive verb, emphasizing the way of speaking rather than the content, such as whispering; Speak quickly; When using transitive verbs, the middle school stage is usually limited to expressing "speaking language", such as speaking Chinese/English.

Tell is often followed by a double object, and the common structure is tell something = tell something to something; Sometimes it is also called "talking", and then an object, such as telling the difference between A and B, follows.

Talk intransitive verb, which can be considered as continuous speech, commonly used phrases: talk with and conversation; Talk about it; discuss