I have been studying for two hours.
How long have you been waiting?
the pattern:
[have] been [verb]ing
Past perfect tense, past perfect continuous tense, present perfect tense, present perfect continuous tense, future perfect tense and future perfect continuous tense.
There is only one tense in the present tense, but within that tense, there are four aspects that includes simple present, present continuous, present perfect, and present perfect continuous.
The general present tense is "Recall". Simple present is "Recalls". Present continuous tense is "Am/is/are recalling". Present perfect tense is "has/have recalled" and present perfect continuous tense is "Has/have been recalling". The general past tense is "recalled". Simple past - "Recalled". Past continuous- "Was recalling/ were recalling". Past perfect - "Had recalled". Past perfect continuous- "Had been recalling".
Actually, "have" is the present tense form for first and second person plural (I, you, we, they) while "has" is the present tense form for third person singular (he, she, it). For example: "I have, you have, we have, they have" versus "he has, she has, it has."
It is the present continuous tense.
Past perfect tense, past perfect continuous tense, present perfect tense, present perfect continuous tense, future perfect tense and future perfect continuous tense.
There is only one tense in the present tense, but within that tense, there are four aspects that includes simple present, present continuous, present perfect, and present perfect continuous.
1)Simple Present Tense, 2)Simple Past Tense, 3)Simple Future Tense, 4)Present Continuous Tense, 5)Past Continuous Tense, 6)Future Continuous Tense, 7)Presnt Perfect Tense, 8)Past Perfect Tense, 9)Future Perfect Tense, 10)Present Perfect Continuous Tense, 11)Past Perfect Continuous Tense, 12)Future Perfect Continuous Tense.
Present perfect tense - have/has gone. Present perfect continuous tense - have/has been going. Past perfect tense - had gone. Past perfect continuous tense - had been going. Future perfect tense - will have gone. Future perfect continuous tense - will have been going.
Present continuos tense: am/is/are excelling Present perfect continuous: have/has been excelling Past continuous tense: was /were excelling Past perfect continuous: had been excelling Future continuous tense: will be excelling Future perfect continuous: will have been excelling
Present continuous: He is driving. Past continuous: He was driving. Future continuous: He will be driving. Present perfect continuous: He has been driving. Past perfect continuous: He had been driving. Future perfect continuous: He will have been driving.
The general present tense is "Recall". Simple present is "Recalls". Present continuous tense is "Am/is/are recalling". Present perfect tense is "has/have recalled" and present perfect continuous tense is "Has/have been recalling". The general past tense is "recalled". Simple past - "Recalled". Past continuous- "Was recalling/ were recalling". Past perfect - "Had recalled". Past perfect continuous- "Had been recalling".
Actually, "have" is the present tense form for first and second person plural (I, you, we, they) while "has" is the present tense form for third person singular (he, she, it). For example: "I have, you have, we have, they have" versus "he has, she has, it has."
The past perfect continuous tense talks about long actions in the past before another action in the past. It follows this structure: Subject + Had + Been + Present Participle. For example: I had been practicing. The present perfect continuous tense talks about an action that has stopped or an action that is continuing up until now. It follows this structure: Subject + Have/Has + Been + Present Participle. For example: I have been practicing. The future perfect continuous tense talks about a long action before a point in the future. It follows this structure: Subject + Will + Have + Been + Present Participle. For example: I will have been practicing.
The present perfect continuous tense of fly is:I/You/We/They have been flying.He/She/It has been flying.
It is the present continuous tense.
This form of the verb can be used in more tenses: present participle, present continuous, past continuous, past perfect continuous, future perfect continuous, future continuous, present perfect continuous.