Let's first have a look at the structure of the Present Perfect Continuous in terms of the various grammatical moods (indicative, interrogative, imperative) and in terms of polarity (positive and negative). And also: third person form where different, and with a modal (here: could).
Positive Structures | |
---|---|
indicative | I have been running. |
indicative contracted | I've been running. |
interrogative | Have you been studying? |
imperative | NOT APPLICABLE |
3rd person singular indicative | She has been managing. |
3rd person singular indicative contracted | She's been managing. |
3rd person singular interrogative | Has he been eating? |
Positive Structures with Modal | |
---|---|
indicative with modal | He could have been driving. |
indicative with modal contracted | I could've been playing. |
interrogative with modal | Could she have been pretending? |
Negative Structures | |
---|---|
indicative | I have not been working. |
indicative contracted (1) | I haven't been smoking. |
indicative contracted (2) | I've not been riding. |
interrogative | Have you not been travelling? |
interrogative contracted | Haven't they been cleaning? |
imperative | NOT APPLICABLE |
3rd person singular indicative | She has been managing. |
3rd person singular indicative contracted | He's been talking. |
3rd person singular interrogative | Has it not been running? |
3rd person singular interrogative contracted | Hasn't she been eating? |
Negative Structures with Modal | |
---|---|
indicative with modal | He could not have been working. |
indicative with modal contracted | They couldn't have been investigating. |
interrogative with modal | Could she not have been teaching? |
interrogative with modal contracted | Couldn't it have been snowing? |
VERB? |
Tense/Modal/Structure |
ASPECT(s) |
VOICE |
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