look forward to
Inseparable
Wait for something with pleasure
I am looking forward to the weekend.
Usage
Followed by a noun or '-ing', never the infinitive: I look forward to seeing you.
Inseparable
The object always comes after the particle, even when it is a pronoun: look after the children, look after them.
Practise it
Add it to your daily practice or see every verb with up.
Further reading: look forward to on Wiktionary (CC BY-SA).