Subject-verb agreement means that your verb must be conjugated, or changed, to fit (or agree) with the subject. Subjects can be singular or plural. Think of singular and plural as mathematical ...

Modal verbs are verbs that indicate likelihood, ability, permission or obligation. Modal verbs change the intention or meaning of the main verb in a sentence by showing whether an action is: Learn ...

Phrasal verbs represent a practically limitless group of verbs that can be combined with short adverbs or prepositions to produce new meanings. Here are some examples: Phrasal verbs are ubiquitous in ...