1. to owe (ditransitive)

2. must, need to, have to (indicates an obligation or requirement) (auxiliary, not in the conditional, colloquially chiefly Latin America, colloquial)

3. must (used to indicate that something is likely) (auxiliary, not in the conditional)

4. should (indicating opinion or expectation) (auxiliary, in the conditional)

a. should have (auxiliary, in the preterite, colloquially chiefly Latin America, colloquial)

b. should have (auxiliary, in the conditional + haber + participle)

5. will need to (auxiliary, colloquially chiefly Latin America, in the future tense, colloquial)

6. to be due to, to be attributable to, to be the result of, to be caused by (reflexive with preposition a)