English verbs are very easy to understand if we know that every verb has "do".
This is similar to Math where every number equals 1 times itself.
5 is equal to 1 times 5.
This is true of every number.
The 1 is there whether we write it or not.
Sometimes we write the 1; sometimes we do not.
It all depends on the situation.
In English, every verb has a "do" just how every number has a 1.
Sometimes we use the "do"
other times we do not.
"Eat", for example, is the same as " do eat".
Sometimes we can say, "eat."
Sometimes we can say, "do eat."
"Do not eat" already has the "do".
Technically, we don't add the word "do" when we say, "do not eat."
"Do" is already there.
The only word we add is "not".
Of course, this is because "not" requires the "do".
So, we have the choice "eat" or "do eat",
but to say, "not," we can only say, "do not eat."
As a question, "Do you eat?"
The sentence would be "You do eat," or "I do eat."
But, we reverse the "do" and the "you" so that they can become a question.
The "do" is already there,
we just don't use it in most statements.
But, the question requires it.
"Yes, I eat," or "I do eat."
Or, "No, I do not eat."
Of course, I'm not sure how long you'd live.
"I like this."
"I do like this!"
We will use the word "do" for emphasis.
This means that "I like this very much!"
The "do" is already there in both situations.
But, when we say it, it adds emphasis because, with English, more words
— one way or another — is more serious.
Similarly, with the past tense, "did eat" is the same as "ate".
When you're studying verbs, do not study words to think of "present" tense and "past" tense.
Do not think "eat" is "present" tense and "ate" is "past" tense.
Rather, think "did eat" is the same as "ate".
What is "ate"?
It's "did eat".
It's easier to see this connection if we use a regular verb that adds "-ed" at the end.
"Did walk" is equal to "walked".
The "d" is there at the end of "walked".
That "d" actually came from "did".
The "-ed" at the end of "walked" is the "did".
"Walked" is "did" and "walk" together.
Now, you can understand how every verb has "do".
Your English will be much easier.
I "do" hope so. ;-)