помогите срочно, очень нужнооо!​

1.if you ask everybody for 1$ you'll collect lots of money.

2.if David speak to the teacher they will sign the petition.

3. if you do not read our leaflet carefully you won't understand it

4. if my sister go on the march my mum will be worried

5. if it rains on saturday we'll take a big umbrella

6.if we take the first train we'll arrive on time