Welcome to our lesson on modal verbs! These special auxiliary verbs are essential for expressing different meanings in English.Modal verbs help us express three main concepts: possibility, necessity, and ability.Let's explore the seven most common modal verbs in English. Each has its own specific function.'Can' expresses ability, 'may' indicates permission, 'must' shows necessity, and 'will' refers to future actions.There are important rules that apply to all modal verbs. Let's examine these key principles.Now, let's look at some examples of correct and incorrect modal verb usage.Modal verbs follow a specific pattern in sentence construction.Here's an example: She must study physics. Each part of the sentence has a specific role.To make a negative statement, we add 'not' after the modal verb.To form a question, we simply move the modal verb to the beginning of the sentence.Let's look at some common mistakes to avoid when using modal verbs.Never use 'to' after a modal verb. The correct form is 'must go', not 'must to go'.Don't add 's' to the main verb after a modal. Use 'can go', not 'can goes'.Always use the base form of the verb. Say 'should study', not 'should studying'.Let's explore how modal verbs combine with perfect infinitives to express past actions and possibilities.These structures allow us to talk about actions that could have happened in the past, but didn't.Now, let's examine how modals can express different levels of formality.Notice how formal expressions often use 'may' and 'might', while informal situations typically use 'can' and 'could'.Modal verbs play a crucial role in expressing politeness in English.Let's look at a scale of politeness, from most formal to casual.Let's look at how these modal forms are used in different contexts.Different situations call for different levels of formality and politeness.Remember to choose the appropriate modal form based on your context and audience.
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