Completa las siguientes oraciones con los verbos en verde seguidos de la forma to + infinitive.
Einstein tried to form a generalized theory of gravitation.
There are actually two different reasons why stars appear to move across our sky.
Scientists agreed to delay controversial bird flu research.
Squirrels seem to like sunflowers and peanuts.
My friend Tom has to move abroad.
Peter doesn't (does not) seem to have any difficulty talking to strangers.
Social partners try to reach consensus on a new national agreement.
Don't (Do not) forget to lock the door at night.
It was quite difficult but I managed to get it all done.
The President failed to deliver on his promise of government transparency.