Пожалуйста предложения презент перфект и паст Симпл ?!?!!

12 How many letters have they written so far?
13 When did he tell you that?
14 Were you at home last night?
15 How often have you travelled abroad till now?
16 He has already left his house
17 We built a tree house last week
18 Two years ago Fiona broke her leg
19 I have already washed the dishes
20 The other day our cat brought home a mouse