1. I used to live in New York, but I don't <u>do so</u> now (x)<br/><br/> 1.1. I used to live in New York, but I don't now.<br/><br/>2. I know the answer, but no one else <u>does so</u>.<br/><br/> 2.1. I know the answer, but no one else...............???????<br/><br/>3. I received a new computer, and I didn't expect to <u>do so</u>.<br/><br/> 3.1. I received a new computer, and I didn't expect it.<br/><br/>The sentences #1,2 and 3 are not correct. So I corrected them in #1.1,2.1 and 3.1. Are they done correctly? (I didn't find the correct form in #2.1.)