It is very difficult.
[spoiler title=»Ответ»]
It is not very difficult.
[/spoiler]
My students are advanced.
[spoiler title=»Ответ»]
My students are not advanced.
[/spoiler]
This apple is red.
[spoiler title=»Ответ»]
This apple is not red.
[/spoiler]
Your tea is ready.
[spoiler title=»Ответ»]
Your tea is not ready.
[/spoiler]
They are angry.
[spoiler title=»Ответ»]
They are not angry.
[/spoiler]
This detail is very important.
[spoiler title=»Ответ»]
This detail is not very important.
[/spoiler]
My hands are clean.
[spoiler title=»Ответ»]
My hands are not clean.
[/spoiler]
I am busy.
[spoiler title=»Ответ»]
I am not busy.
[/spoiler]