Gramática

ADJ as to wh

The 'uncertain' group

These adjectives indicate that someone is certain or, more commonly, uncertain about a situation, or that they know or do not know about it.
Scientists were not at all clear as to what was going on in the Earth's crust.
A trifle uncertain as to what to do for the best, she decided to go in.
The preposition as to is sometimes followed by a noun group.
The two species of lemur belong to a distinct family, but zoologists are still uncertain as to their closest relatives.
Many buyers and sellers may be a little unsure as to the condition of the property market.
  • certain
  • clear
  • clueless
  • confused
  • doubtful
  • hazy
  • ignorant
  • informed
  • sure
  • unaware
  • uncertain
  • unclear
  • undecided
  • unsure
  • vague
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