I was watching this video about Cyclopia on youtube and noticed this sentence: How does an animal that normally has two eyes develop just one in the center of its face.
I tried to google it but I couldn't find an answer, and it's really nagging me. So, shouldn't it be "develops" being the subject of the verb "an animal"? Btw, I also heard someone saying "It doesn't seem safe", instead of "It doesn't seems safe" in a movie. Can someone explain to me the proper usage, and if you can keep it simple, please... I'm not a native speaker, and most of my English I learned from watching movies and tv shows, I'm just now trying to learn about grammar and stuff.
Ps: Was this post to lengthy? That's my first time here on stackexchange and I'm not really sure how I should approach writing my questions.