"I have been doing something" is an example of the present perfect continuous.
The past of cut is cutThe past participle of cut is cutThe present participle of cut is cutting.The present continuous is formed with -- am/is/are + present participleSo for cutting present continuous is -- am cutting, is cutting, are cuttingThe past continuous is formed with -- was/were + present participleSo for cutting past continuous is -- was cutting, were cutting
Present continuous is formed with be verb + present participle. The present tense be verbs = am / is / are, the present participle of come = coming so the present continuous isam/is/are coming
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.
It is "is/are giving"
Present simple: I/You/We/They lead. He/She/It leads. The present participle is leading. Present continuous: I am leading. You/We/they are leading. He/She/It is leading.
The phrase "They are being used" is in the present continuous tense. This form indicates that the action is currently happening.
The present continuous tense:I am shying.You/We/They are shying.He/She/It is shying.
The present continuous tense of stop is:I am stopping.He/She/It is stopping.You/We/They are stopping.
There are five tenses: 1.simple present 2.present continuous 3.present perfect 4.present perfect continuous 5. present passive
The present continuous tense of lay:I am laying.You/We/They are laying.He/She/It is laying.
The present continuous tense of began:I am beginning.You/We/They are beginning.He/She/It is beginning.
Technically, two (present and past) but commonly, we say there are 12: past simple present simple future simple past continuous present continuous future continuous past perfect present perfect future perfect past perfect continuous present perfect continuous future perfect continuous