Как сказать по- к сожалению ( вводное слово)?

к сожалению на языке будет unfortunately

часто в качестве вводного слова используют слово however, что значит однако.

1. newspapers are bought every morning

2. the garbage is taken out every day

3. food for our pets is bought once a week

1. she wasn't invited to the party (by them).

2. the windows weren't left open (by me).

3. the light wasn't turned off (by them).

4. some friends has been invited to tea (by me).

5. an english book has been given to me (by her).

6. has the letter been written yet?

7. a lot of interesting things have been told to us (by them).