Answer:
Okay bear with me as this is a huge wall of text, but it seems rather straightforward.
Some of these sentences are a bit weird though so many waiting for someone else to put it together could be beneficial!
Explanation:
1) The professor <em>taught</em>
five classes Monday. He <em>was</em><em>?</em><em> </em><em>(</em><em>be</em><em> </em><em>is</em><em> </em><em>weird</em><em> </em><em>here</em><em>)</em>
afterward
2) You <em>fed</em>
the birds that we saw yesterday. Some of them <em>were</em>
cardinals.
first on the trail Saturday, because he <em>knew</em>
the way
3) Andy <em>went</em>
better than we did.
4) The house <em>was</em>
dirty after they left. We <em>cleaned</em>
it yesterday
the motorcycles in the garage, then they <em>ate</em>
5) The boys <em>placed</em><em> </em><em>(</em><em>put</em><em> </em><em>is</em><em> </em><em>also</em><em> </em><em>weird</em><em> </em><em>here</em><em>?</em><em>?</em><em>)</em>
lunch
6) My friends and I <em>found</em>
some gold in the river. Then we <em>looked</em>
for
more.
7) 1 liked
to write poetry when I <em>was</em>
eight years old.
8) Charlotte and I <em>saw</em> lightening in the sky Thursday night; the storm <em>came</em>
fast.
9) The children <em>went</em>
to the park yesterday. They <em>stayed</em>
for two hours
outside after it <em>snowed</em>
Three inches of snow <em>fell</em>
10) We <em>played</em>
that day