Hi,<br/><br/>How do I gain an insight as to distiinguish properly in a situation when the 'it' is optional in situations like this?<br/><br/>Q: Would you like for us to make the paper airplane for you?<br/><br/>A: 1. No, I want to make on my own.<br/><br/> 2. No, I want to make <u>it</u> on my own. <br/><br/>Here, I think both no.1and 2 are acceptable. How do I gain insight as to when the likes of 'it' is optional or not?