por

1. indicates motion
2. for (over a period of time)
3. about, around (near, in the vicinity of)
4. for (to obtain)
5. for (in exchange for)
6. for (on behalf of)
7. times, by, multiplied by
8. by (indicates the actor in a clause with its verb in the passive voice)
9. by, by means of
10. per

tanto

• Adv

  so much (to a large or excessive degree)

• Pron
• Pron

creo

first-person singular present indicative of crer

que

• Conj

  1. that
  2. than (used in comparisons, to introduce the basis of comparison)

• Adj
• Adv
• Pron
• Noun

é

is; third-person singular present indicative of ser

importante

important