PP. we have just had tea. (Мы только что попили чай)
have we had tea?
we have not had tea.
PP. I had written a letter by 5 o'clock yesterday. (я вчера написал письмо к 5 часам)
had I written a letter?
i hadn't written a letter by 5 o'clock.
FP. I'll have washed the dishes by 2 o'clok tomorrow.( я закончу мыть посуду завтра к 2 часам)
Will i have washed the dishes?
I won't washed the dishes by 2 o'clok tomorrow.