Types of Verbs: Main Helping Linking
先写下记得的内容，再查看解释。不要填写个人信息。
查看解释
A main verb carries the central meaning of a clause, whether an action like push, a mental activity like imagine, or a state. A linking verb, such as seem or is, is a type of main verb that connects the subject to an identity or description. A helping verb works with a main verb to form tense, aspect, mood, questions, or negatives.
The operations director reviewed the quarterly safety statistics.