Поставить в правильную форму 1. how long (work) for this company? 2. i (queue) for half an hour so far. 3. i (wait) for you 4. i (try) to catch a taxi for an hour now

1. How long have you been working for this company?
2. I have been queuing for half an hour so far.
3. I have been waiting for you.
4. I have been trying to catch a taxi for an hour now.