1 I drink tea
2 I'm drinking tea
3 I have drunk tea
4 I have been drinking tea
who have grilled sausages? - вопрос к подлежащему
We have grilled sausages, haven't we? - разделительный вопрос
Have we grilled sausages or not ? - альтернативный
1 I drink tea
2 I'm drinking tea
3 I have drunk tea
4 I have been drinking tea
who have grilled sausages? - вопрос к подлежащему
We have grilled sausages, haven't we? - разделительный вопрос
Have we grilled sausages or not ? - альтернативный