Технически можно, но в первом случае с he...(want) лучше не использовать Does want, а he wants , ибо будет тавтология.
1) I (shall или will accompany) you with pleasure as soon as I (finish) my report.
2) The performance (will be) a great success if he (plays) the leading role.
3) If this time (is) convenient for you, we (shall или will meet) tomorrow.
4) We (shan't или won't complete) the work this week in case he (gets) ill.
5) We (shan't или won't start) till he (arrives).
6) If he (leaves) now, he (will miss) the rush hour.
7) As soon as he (returns) from the beach, we (shall или will have) dinner.
8) I (shall или will phone) you when she (comes).
