Generally, the positive form of the present tense is the same as the infinitive, but the third person singular should be added with s:
The general present tense of irregular verbs is exactly the same as that of regular verbs.
B Abbreviated form: the verb do is usually abbreviated in negative and negative questions (see section 103A):
I don't work.
He doesn't work.
Don't I work?
Doesn't he work?
Spelling precautions
Use ss, sh, ch, x and. When the verb at the end constitutes the third person singular, you should add es:
I kiss and he kisses.
I fight, he fights.
I rushed, he rushed.
I have, and he has.
I watched, he watched.
I'll go and he'll go.
For verbs ending with the letter Y, when there is a consonant letter before Y, Y should be changed to I and es should be added:
I have it, and he has it.
I copy, he copies.
I work hard and he works hard.
Verbs ending in the letter Y, when preceded by vowels, change according to the usual rules:
I obey, he obeys.
I said, he said
173 is used to indicate habitual action.
A is used to indicate habitual action:
He smokes.
He smokes. Dogs can bark.
Dogs bark.
Cats drink milk.
Cats drink milk.
Generally, the present tense doesn't tell us whether the action is going on when we speak. If we want to understand this, we must add the progressive form of verbs:
He's working. He always works at night.
He's working. He often works at night.
My dog barks a lot, but it doesn't bark now.
My dog always barks, but not at the moment.
The simple present tense is often used with some adverbs or adverb phrases, such as always, never, sometimes, often, sometimes, universally, every week, Monday, twice a year, etc.
How often do you wash your hair?
How often do you wash your hair?
I go to church on Sunday.
I go to church on Sunday.
It rains in winter.
It often rains in winter.
Or used with a time clause indicating an agreement or habitual action.
When never and when (= when never) are particularly useful:
Whenever it rains, the roof leaks.
Whenever it rains, the roof leaks.
When you open the door, the light comes on.
As long as you open the door, the light will come on.
174 other uses
When asking about or quoting the contents of books, notices or recently received letters, the simple present tense is usually used with the verb say:
What did the notice say?
It says, "No parking."
What did the notice say?
The notice said, "No parking."
What does the book say?
It said, "Cook slowly."
What does this book say?
The book says, "Cook slowly."
I see you have received a letter from Ann. What did she say?
She said that she would come to London next week.
I know you have received a letter from Ann. What did she say?
She said that she would come to London next week.
Shakespeare said, "Don't lend money to others, and don't lend money to others."
Shakespeare said, "neither borrow money from others nor lend money to others."
Other verbs that express the meaning of speaking or communicating can also use the simple present tense:
Shakespeare advised us not to borrow or borrow.
Shakespeare advised us not to lend money or others.
The notice at the end of the road warned people not to go any further.
The notice at the end of the road warned people not to go any further.
Headlines that can be used in newspapers, news, etc. :
The murderer who killed many people escaped.
The peace talks failed
C is used for dramatic narration. It is extremely useful in describing actions in drama, opera, etc. It is also often used by radio commentators and commentators to report on sports and public meetings;
Juliet was writing at her desk when the curtain rose. Suddenly, the window opened and a masked man came in.
When the curtain rises, Juliet is sitting at the table writing. Suddenly, the window opened and a masked man came in.
D means a planned future action or a series of actions, especially on a journey. Travel agencies often use this:
We will leave London at 0/0: 00 next Tuesday and arrive in Paris at 0/3: 00/kloc.
We stayed in Paris for two hours and then left again at15: 00. We arrived in Rome at 19∶30 and stayed in Rome for four hours …
We will leave London at 10 next Tuesday morning and arrive in Paris at 1 in the afternoon. Stay in Paris for two hours and leave Paris at 3 o'clock; Arrive in Rome at 7: 30 and stay in Rome for four hours. ...
E verbs that cannot be used in the present continuous tense, such as love, seeing, believing, etc. You must use the simple present tense instead of the present continuous tense, so I love you instead of me. (See section 168. )
F is used for conditional sentence type 1 (see section 22 1):
If I see Ann, I will ask her.
If I see Ann, I will ask her.
The car won't move unless you release the brakes.
The car won't move unless you release the brakes.
G is used in the time clause.
(a) has a conventional meaning:
He spent the money as soon as he earned it.
He spends money when he earns money.
She takes the boy to school before going to work.
She sent the boy to school before going to work.
(b) When the main verb is the future (see section 342):
The rain will stop soon. Then we go out. Equivalent to:
When the rain stops, we will go out.
The rain will stop soon. Then we go out.
Rib is mainly used to treat body fluid injury caused by fever, thirst, emaciation, weakness due to kidney deficiency, dry cough, constipation, tonic, nourishing yi