Simple present form of the verb

The simple present, present simple or present indefinite is one of the verb forms associated with the present tense in modern English. It is commonly referred to as a t, although it also encodes certain information about aspect in addition to present time. The simple present is the most commonly used verb form in English, accounting for more than half of verbs in spoken English.

It is called "simple present" because its simply present.in contrast with other present tense forms such as the present progressive and present perfect. 

The basic form of the simple present is the same as the base form of the verb, unless the subject is third person singular, in which case a form with the addition of -(e)s is used

Conjugation

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

For verbs that end in a consonant + y, the letter y is replaced by the suffix -ies......

Examples:

• Marry – Marries
• Study – Studies
• Carry – Carries
• Worry – Worries

In other cases, the suffix -s is added.

Examples:

• Play – Plays
• Enjoy – Enjoys
• Say – Says