doubt, doubts, doubted, doubting

DOUBT - PRESENT SIMPLE
★ i doubt
★ you doubt
★ he/she/it doubts
★ we doubt
★ you doubt
★ they doubt
DOUBT - PRESENT CONTINUOUS
★ i am doubting
★ you are doubting
★ he/she/it is doubting
★ we are doubting
★you are doubting
★ they are doubting
DOUBT - PRESENT PERFECT
★ i have doubted
★ you have doubted
★ he/she/it has doubted
★ we have doubted
★ you have doubted
★ they have doubted
The Simple Past Tense, also called Simple Past or Preterite is a verb tense that is used to describe completed action happened 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 Perfect is a tense used to express the activity that started in the past and is still going on in the present tense. In British English this is the most used tense of them all. When you want to tell about your experience up to the present, you use Present Perfect. The prepositions that are often used with this tense are NEVER, EVER, JUST, ALREADY, YET and many others.
DOUBT - PRESENT PERFECT CONTINUOUS
★ i have been doubting
★ you have been doubting
★ he/she/it has been doubting
★ we have been doubting
★ you have been doubting
★ they have been doubting
DOUBT - PAST SIMPLE
★ i doubted
★ you doubted
★ he/she/it doubted
★ we doubted
★ you doubted
★ they doubted
DOUBT - PAST CONTINUOUS
★ i was doubting
★ you were doubting
★ he/she/it was doubting
★ we were doubting
★ you were doubting
★ they were doubting
DOUBT - PAST PERFECT
★ i had doubted
★ you had doubted
★ he/she/it had doubted
★ we had doubted
★ you had doubted
★ they had doubted
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
DOUBT - PAST PERFECT CONTINUOUS
★ i had been doubting
★ you had been doubting
★ he/she/it had been doubting
★ we had been doubting
★ you had been doubting
★ they had been doubting
DOUBT - FUTURE SIMPLE
★ i will doubt
★ you will doubt
★ he/she/it will doubt
★ we will doubt
★ you will doubt
★ they will doubt
DOUBT - FUTURE CONTINUOUS
★ i will be doubting
★ you will be doubting
★ he/she/it will be doubting
★ we will be doubting
★ you will be doubting
★ they will be doubting
DOUBT - FUTURE PERFECT
★ i will have doubted
★ you will have doubted
★ he/she/it will have doubted
★ we will have doubted
★ you will have doubted
★ they will have doubted
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.
DOUBT - FUTURE PERFECT CONTINUOUS
★ i will have been doubting
★ you will have been doubting
★ he/she/it will have been doubting
★ we will have been doubting
★ you will have been doubting
★ they will have been doubting

conjugation of verb doubt