In Question marks^x, Past tenses^x

The first is correct. "Did you know" is a past tense. The present tense would be "Do you know". It is a question, so you need a question mark. You could also say "Did/Do you know that I am intending/I plan to buy an iPod Touch?"

"... when you have both finished" sounds awkward, is it a common sentential constuct? Yes, it's a normal construct And your sentence "What were the questions like?" looks good but can I also say "How were the questions like?"? No, but you could say "How were the questions?' or 'How did you...

Overall points. Don't forget to end all sentences with a full stop/period/question mark. You overuse 'understand' in contexts where 'learn' would be better. I've made a few corrections for you but otherwise spelling errors in red. Grammatical errors in blue. Parts that need rephrasing/do not...

Where have you beenI was in the hospital (first two lines are past tense. the person was in hospital but is not now.Why are you thereBecause I'm sick (these lines are present tense. the person is in hospital at the moment.What is the matterI'v an earache (I've, but I have an earache would be...

Hello everyone, In working with my own people, still I am not an exception allowing myself to judge what is right or what is not right in English grammar and idiomatic expression, I felt this sentence bit awkward or strange - but it's rather my perception wrong? The sentence reads: When...