Put the verbs from brackets in their correct form in the given clauses of time and condition:
1.If my sister-in-law (to write) me when she is arriving,I'll prepare a bdroom for her on time.
2.When students (to graduate) from the Univrsity,the (to start) to train for their profssions.
3.As soom as I (to become) a mechanic,I (to repair) all my car accessories.
4.I (to go) to her first-night perfomance in case she (to invite) me.