In English grammar, helping verbs (also known as auxiliary verbs) are used in combination with main verbs to express shades of time and mood. They "help" the main verb by adding information about tense, voice, modality, and emphasis. Some common helping verbs include: be, have, do, can, could, may, might, must, shall, should, will, and would.
Understanding helping verbs is essential for building grammatically correct sentences and expressing precise meanings. With practice and application, students can master the usage of helping verbs in their writing and communication.