Use the right forms of the verbs to add, to ask, to wonder , to explain, to tell, to say, to want in these sentences

1) Boris said to his sister that he had already spoken to their trainer. 2) Margaret wanted to know if they had finished building their garage. 3) Andrew asked if my cousin had flown to America. 4) Albert told that he had lost his textbook. 5) Ann said to the children what they should do. 6) We explained that we didn\'t want to be late for the train.