I taught my students how to divide decimal numbers today.
If he had known that it would've hurt, he wouldn't have said it.
The man had dug a hole earlier for his plant he wanted to grow.
a speaker can use logos in a speech so people can vote for him/her
You should choose whichever issue is most prominent, then research to find the topic with the most reliable information. from there, you can build your base on that solid information. it has to be facts or a legitimatized opinion, otherwise you can't easily defend your position on said topic. make sure your opinion is well founded. you should also be interested in the topic, otherwise your attention will slip.
B : Dr. James Naismith, a teacher, invented the game of basketball.
Both the verbs smiled and stepped are in the Simple Past