I’m not sure if (subject + verb)

‘I’m not sure’ expresses a feeling of uncertainty or lack of confidence on a particular matter.

Here are some examples:

“I am not sure if they will offer me the job.”
“I’m not sure if she’ll return my call.”
“I’m not sure if my wife will understand.”
“I’m not sure if we will go out tonight.”
“I’m not sure if I understand your question.”
“I am not sure if I can handle it.”
“I am not sure if it will happen.”
“I am not sure if it will matter.”
“I am not sure if my mom will notice.”
“I am not sure if they will permit us to park there.”

Do you mind if I + (verb)

You are asking someone in present tense if they object to something you are asking.

Here are some examples:

“Do you mind if I excuse myself?”
“Do you mind if we left early?”
“Do you mind if I take a nap?”
“Do you mind if I ask your mom?”
“Do you mind if it snows?”

You could also use the word ‘would’

Here are some examples:

“Would you mind if we went out to eat?”
“Would you mind if I opened the window?”
“Would you mind telling me what you’re doing?”
“Would you mind being quiet for a minute?”
“Would you mind if I changed the channel?”