ÍT TỪ- NHIỀU VĂN PHẠM- few words- much more grammar

She sees         what happens.
She sees         what will happen.
She is seeing  what has happened.
She saw          what happened.
She was seeing  what happened.She saw          what would happen.
She saw         what was happening.
She saw          what had been happening.
She has seen  what has happened.
She's been seeing  what has happened.
She has seen  what has been happening.
She had seen  what would happen.
She is seen     what happens.
She was seen what happened.
She was seen what had happened.
She was seen what had been happening.