Check, checks, checking, checked

CHECK - PRESENT SIMPLE
★ i check
★ you check
★ he/she/it checks
★ we check
★ you check
★ they check
CHECK - PRESENT CONTINUOUS
★ i am checking
★ you are checking
★ he/she/it is checking
★ we are checking
★you are checking
★ they are checking
CHECK - PRESENT PERFECT
★ i have checked
★ you have checked
★ he/she/it has checked
★ we have checked
★ you have checked
★ they have checked
The Simple Past Tense, also called Simple Past or Preterite is a verb tense that is used to describe completed action happend in the past. It is the most basic form of past tense and it is formed by adding d, ed or ied to the base structure of the verb.
Present Continuous is a tense used for activities that are happening in the moment of speaking. It also can be used in a future aspect for future arrangements or plans. This tense is always used when you are describing a picture. The most used prepositions used with Present Continuous are AT THE MOMENT and NOW.
CHECK - PRESENT PERFECT CONTINUOUS
★ i have been checking
★ you have been checking
★ he/she/it has been checking
★ we have been checking
★ you have been checking
★ they have been checking
CHECK - PAST SIMPLE
★ i checked
★ you checked
★ he/she/it checked
★ we checked
★ you checked
★ they checked
CHECK - PAST CONTINUOUS
★ i was checking
★ you were checking
★ he/she/it was checking
★ we were checking
★ you were checking
★ they were checking
CHECK - PAST PERFECT
★ i had checked
★ you had checked
★ he/she/it had checked
★ we had checked
★ you had checked
★ they had checked

 

A transitive verb always has a noun that  receives the action of the verb, called the direct object.
An intransitive verb never has a direct or indirect object. Although an intransitive verb may be followed by an adverb or adverbial phrase, there is no object to receive its action
CHECK - PAST PERFECT CONTINUOUS
★ i had been checking
★ you had been checking
★ he/she/it had been checking
★ we had been checking
★ you had been checking
★ they had been checking
CHECK - FUTURE SIMPLE
★ i will check
★ you will check
★ he/she/it will check
★ we will check
★ you will check
★ they will check
CHECK - FUTURE CONTINUOUS
★ i will be checking
★ you will be checking
★ he/she/it will be checking
★ we will be checking
★ you will be checking
★ they will be checking
CHECK - FUTURE PERFECT
★ i will have checked
★ you will have checked
★ he/she/it will have checked
★ we will have checked
★ you will have checked
★ they will have checked
Present Simple is a tense used for talking about habits or activities that are constantly repeating. We also use Present Simple if we are talking about general thrust or facts about nature. This tense is also used in the Zero Conditional sentences and it is one of the most basic but also most important tenses of the English language. The most used prepositions with Present Simple are OFTEN, USUALLY, ALWAYS and many more.

CHECK - FUTURE PERFECT CONTINUOUS
★ i will have been checking
★ you will have been checking
★ he/she/it will have been checking
★ we will have been checking
★ you will have been checking
★ they will have been checking

Conjugation of verb check