1. To say that one peson wants, suggests, or demands that someone else do something, use the subjuntive mood. It normally has two clauses the main and the subordinate clause connected with que.
Quiero que respires lentamente
Sugiero que bebas agua antes de correr
2. To form the subjunctive substitute the "o" from the yo form of present indicative and replace it with opposite endings (-ar=e, es, e, emos, en and -er/ir=a, as, a, amos, an)
3. Be aware of verbs ending in car, gar, zar have spelling changes.
4. Remember the irregulars dar, estar, haber, ir saber, ser