If you are looking forward something that is going to happen, you want it to happen because you think you will enjoy it.
He was looking forward to working with the new Prime Minister.
If you say that someone is looking forward to something useful or positive, you mean they expect it to happen.
Motor traders are looking forward to a further increase in vehicle sales.
look forward to是「片語動詞」(phrasal verb)，結構是：動詞＋副詞＋介系詞。
2014-06-15 06:55:03 補充：
typo: If you are looking forward to something ...
2014-06-15 07:00:43 補充：
If you look ahead, you think about what is going to happen in the future and perhaps make plans for the future.
I am trying to look ahead at what might happen and be ready to handle it.
2014-06-15 07:05:43 補充：
If you look forward, you look in a direction that is in front of you.
Collins Cobuild English Dictionary for Advanced Learners p.986 的說明及例句