Russian-English translations for предположи́тельно

• ought
  I ought to vote in the coming election
  You ought to stand back from the edge of the platform
  He ought to read the book; it was very good
• presumably
  Presumably, he will attend the opening
• purportedly
• putatively
• supposedly
  People from other planets have supposedly visited Earth in flying saucers.
  According to your testimony, you were supposedly at home watching TV when the murder occurred.