Today I am going to write about the formation of the simple present tense. Below you will find a more detailed explanation from http://www.edufind.com/english-grammar
Simple present tense
The simple present tense is used:
- To express habits, general truths, repeated actions or unchanging situations, emotions and wishes:
I smoke (habit); I work in London (unchanging situation); London is a large city (general truth)
- To give instructions or directions:
You walk for two hundred meters, then you turn left.
- To express fixed arrangements, present or future:
Your exam starts at 09.00
- To express future time, after some conjunctions: after, when, before, as soon as, until:
He’ll give it to you when you come next Saturday.
Be careful! The simple present is not used to express actions happening now.
- For habits
He drinks tea at breakfast.
She only eats fish.
They watch television regularly.
- For repeated actions or events
We catch the bus every morning.
It rains every afternoon in the hot season.
They drive to Monaco every summer.
- For general truths
Water freezes at zero degrees.
The Earth revolves around the Sun.
Her mother is Peruvian.
- For instructions or directions
Open the packet and pour the contents into hot water.
You take the No.6 bus to Watney and then the No.10 to Bedford.
- For fixed arrangements
His mother arrives tomorrow.
Our holiday starts on the 26th March
- With future constructions
She’ll see you before she leaves.
We’ll give it to her when she arrives.
Forming the simple present tense: to think
|I think||Do I think?||I do not think|
|You think||Do you think?||You do not think|
|He thinks||Does he think?||He does not think|
|She thinks||Does she think?||She does not think|
|It thinks||Does it think?||It does not think|
|We think||Do we think?||We do not think.|
|They think||Do they think?||They do not think.|
Notes on the simple present, third person singular
- In the third person singular the verb always ends in -s:
he wants, she needs, he gives, she thinks.
- Negative and question forms use DOES (= the third person of the auxiliary ‘DO’) + the infinitive of the verb.
He wants ice cream. Does he want strawberry? He does not want vanilla.
- Verbs ending in -y : the third person changes the -y to -ies:
fly –> flies, cry –> cries
Exception: if there is a vowel before the –y:
play –> plays, pray –> prays
- Add -es to verbs ending in:-ss, -x, -sh, -ch:
he passes, she catches, he fixes, it pushes
- He goes to school every morning.
- She understands English.
- It mixes the sand and the water.
- He tries very hard.
- She enjoys playing the piano.