Dear Vic, I found that in your lesson, something like this.
Watashi ha ringo wo tabeta.
Here ‘ha’ is OK, but when you speak in Japanese ‘ha’ should be pronounced as ’wa ‘ So here you have to write as watashi wa ringo wo tabeta. According to my knowledge I found that it’s better if you can write’ wo’ as ‘o’ but I’m not very much sure about that but Please find it out somewhere. I saw In some place you did indicate the thing what I said. But you can’t write it like that. if you do so pronunciation error can be occurred. Thank you very much. Bye,
どうも ありがとう ございます!