លំហាត់
- ចូរដោះស្រាយសមីការខាងក្រោមៈ
- $x^2+x-2=0$
- $x^2-4x+3=0$
- $x^2-7x+6=0$
- $x^3-x^2+x-1=0$
$a^2-2b+1\ge0$ និង $b^2-2c+1\ge0$ និង $c^2+2a+1\ge0$
Present simple Rule
1. Affirmative sentences in the Simple Present
2. Negative sentences in the Simple Present
3. Interrogative sentence :-
For pronouns I, you, we, they, there is no modification for verbs.
For pronouns he, she, it, a suffix is added following these rules:
For verbs that end in -o, -ch, -sh, -s, -x, or -z, the suffix -es is added
Examples:
- Go – Goes
- Catch – Catches
- Wash – Washes
- Kiss – Kisses
- Fix – Fixes
- Buzz – Buzzes
Examples:
- Marry – Marries
- Study – Studies
- Carry – Carries
- Worry – Worries
Examples:
- Play – Plays
- Enjoy – Enjoys
- Say – Says
Examples
-
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.
-
For habits
