The professor who teach that class come from Brazil.
I am in this country since 2007.
She has a different major to me.
wrong word form
She has a difference major than me.
wrong verb form
Sing and dance are my favorite things.
wrong personal pronoun
Last week, I forgot to water my plants, so it wilted.
The students books were ready for delivery.
I’ll buy my fabric form Thailand.
i’m taking color and design this semester.
The students did well on the exam. Because they studied.
They hadn’t studied , they’d stayed up late.
The students took a test they weren’t prepared to take so when they found out they had all failed they called their parents to complain that they had been really sick and so couldn’t really focus on the stuff anyway.
The teacher assigned three assignment.
We dont have class tomorrow
Content has shifted to a different topic.
While I am waiting, I watched the stars come out.
The my major was economics.
change word order
We outside of the house ran.
Dancing and to sing are my favorite things.
insert missing word(s)
I ^ interested in fashion.
Your meaning is unclear. Simply changing the grammar will not help. Try to rewrite the idea rather than rework the sentence. Try using different words, or try using two or three smaller sentences.