Grammar A1 - Can

Here is a summary of the video:

• Meaning of "Can": The word "can" functions like a green light placed in front of an action to signal skill, power, or possibility. Saying "I can swim" shifts the focus from a routine fact ("I swim") to capability or potential.
• No Subject Conjugation: The word "can" never changes form regardless of the subject (e.g., "I can," "she can," "they can"). The standard English rule of adding an "s" for third-person singular ("he" or "she") does not apply.
• Base Form for the Following Verb: The main verb that follows "can" must remain in its base form. You do not add "-ing," "-s," or "to" (e.g., correct: "she can drive"; incorrect: "she can drives" or "she can to drive").
• Expressing Inability ("Can't"): Adding a 't creates "can't" (short for "cannot"), which acts as a red light or roadblock to show a lack of a specific skill. It follows the exact same grammatical rules as "can".
• Forming Questions: To ask about someone's skills, reverse the word order of the subject and "can" (e.g., change "you can cook" to "can you cook?").