When to use tell and tells in asentence?

"Tell" and "tells" are both forms of the verb "to tell," but they are used in different tenses and grammatical contexts:

Tell:

* Present tense: When you are talking about an action that is happening right now. Example: "She tells me a story."

* Imperative mood: When you are giving a command. Example: "Tell me what happened."

* Past tense: When you are talking about an action that happened in the past. Example: "He told me a secret."

* Infinitive form: Used after "to". Example: "I want to tell you something."

Tells:

* Third person singular present tense: Used when the subject of the sentence is a single person or thing in the third person (he, she, it). Example: "The book tells a fascinating tale."

* Present continuous tense: Used to describe an action that is happening now. Example: "She is telling me a story."

Here are some examples:

* Tell: "Please tell me what happened."

* Tells: "The clock tells the time."

* Tell: "He told me a joke."

* Tells: "She tells me about her day."

* Tell: "I want to tell you a secret."

Remember:

* "Tell" is the base form of the verb.

* "Tells" is used for the third person singular present tense (he/she/it).

If you are unsure which form to use, consider the subject of the sentence and the tense of the verb.