Rules
We add the word if or whether. We use
statement word order.
We remove do/does/did. We add if or whether.
The verb shows the -s ending for he, she, it in the present or uses the past form.
We can add or not at the end of an
included yes/no question.
We can add or not directly after after whether, but not directly after if. |
Examples
Are lungs the largest internal organ in the human body? I was not sure whether lungs are the largest internal organ in the human body. Did Albert Einstein fail most of the subjects in school? They wanted to know if Albert Einstein failed most of the subjects in school. Does she know all school subjects very well? I wonder if she knows all school subjects very well. I was not sure if/whether lungs are the largest internal organ in the human body or not. I was not sure whether or not lungs are the largest internal organ in the human body. |
I don't know Please tell me I have no idea I wonder I don't remember You need to decide | I'm not sure Nobody knows I can't understand I'd like to know I can't tell you It's important to ask | Do you remember Can you tell me Do you understand Would you like to know Does anyone know Do you know |