Refer is the present tense.
The present tense of the verb 'was' is is.
Can is the present tense.
The present tense for the verb "have" is "have" for the pronouns I, you, we, and they, and "has" for the pronouns he, she, and it.
"Is" is the present tense form of the verb "to be" and "has" is the present tense form of the verb "to have."
Present tense: The verb indicates an action that happens currently. e.g. I play football. Past tense: The verb indicates an action that happened. e.g. I played football yesterday. Future tense: The verb indicates an action that will happen. e.g. I will play football tomorrow.
Studied is not a present tense verb. It is the past tense of study (present tense).
Present tense.
Washes is the present tense.
* I am * you/we/they are * he/she/it is
The present tense is 'is'
But is not a verb and does not have a present tense.
The verb is is the present tense.