Changing and Unchanging Verbs
These next pages are super important. Don't move on until you fully understand them. You'll use these ideas whenever you speak English.
Main verbs show the action in a sentence. Every sentence has one (or the verb to be). Main verbs come in two forms: the changing form (like see/ sees) and the unchanging form (see).
The unchanging form is the action part of the main verb: see, do, go, make. This is also called the simple form. You don't add -s to the simple form.
Helping verbs change and work with the simple form of the main verb. The helping verb takes over the main verb's job.
Let's use a helping verb to make a regular statement stronger. This shows a stronger opinion. In a regular statement, you skip over the helping verb spot.
For he, she, it, the helping verb changes from "do" to "does." The main verb stays simple. The emphatic form isn't used a lot, but it helps with negative statements and questions.
Adding Does for Emphasis (He, She, It)
Add does to make the statement stronger. Use the unchanging form of the main verb (simple form).
Main Verb Helping Verb + Unchanging Form
The boy eats apples. The boy does eat apples.
1. My bus comes late.
2. My boss needs this done.
3. The clock costs a lot.
4. Tom makes mistakes.
5. The car runs well.
Adding Do for Emphasis (I, You, We, They)
Adding Do or Does for Emphasis
The infinitive is to + simple form, such as to be, to do, or to go. It is used like a noun. You can say I eat pizza, I want pizza, or I want to eat pizza.