toutefois

In a sentence

• J'ai étudié toute la nuit; toutefois, je n'ai pas réussi l'examen.

  I studied all night; however, I didn't pass the exam.

  Here, 'toutefois' is used as a conjunction, indicating contrast between the effort made and the outcome.

• Elle veut venir à la fête; toutefois, son emploi du temps est chargé.

  She wants to attend the party; however, her schedule is busy.

  In this example, 'toutefois' introduces a contrasting statement to the desire expressed before.

• Ce projet est intéressant; toutefois, il nécessite beaucoup de ressources.

  This project is interesting; however, it requires many resources.

  Here, 'toutefois' signifies a concession, contrasting the project's interest against its demands.