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"I'm not sure" vs "Not sure if he will"

Both phrases are correct, but they are used in different contexts. 'I'm not sure' is a common expression used when someone is uncertain about something. 'Not sure if he will' is a statement expressing uncertainty about someone else's actions or decisions.

Last Updated: March 21, 2024

I'm not sure

This phrase is correct and commonly used in English to express uncertainty about something.

This phrase is used when someone is uncertain about a fact, decision, or situation. It is a common expression in everyday conversations.

Examples:

  • I'm not sure if I can make it to the party tonight.
  • I'm not sure what time the meeting starts.
  • I'm not sure if I locked the door before leaving.

Alternatives:

  • I'm uncertain
  • I'm unsure
  • I'm not confident
  • I'm not convinced
  • I'm not positive

Not sure if he will

This phrase is correct and is used to express uncertainty about someone else's actions or decisions.

This phrase is used to indicate doubt or uncertainty about what someone else will do or decide. It is commonly used in conversations when discussing other people's intentions or plans.

Examples:

  • I'm not sure if he will come to the party.
  • Not sure if he will accept the job offer.
  • Not sure if he will be able to finish the project on time.

Alternatives:

  • Uncertain if he will
  • Unsure if he will
  • Doubtful if he will
  • Questioning if he will
  • Indecisive if he will

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