помогите пожалуйста ,просто напишите форму правильно:

1)I had been walking for about half an hour when at last i (to see)____ a little house near the river.I (to understand) ____ at once that  it (to be)____ the house about which Ann (to tell)_____ me a few weeks before.I (to knock)_____ at the door and (to ask)_____to come in by the voice from inside.A women (to sit)____at the window with a book in her hands.

2)Sarah and i are old friends.We (to know)____each other since we (to be)___in primary school.

3)Close the window,please.It (to rain)_____.