YOU SAID:

i really need a white t shirt but they're expensive???

INTO JAPANESE

私は本当に白いTシャツが必要ですが、それらは高価ですか？

BACK INTO ENGLISH

I really need white t-shirts, but are they expensive?

INTO JAPANESE

白いTシャツがどうしても欲しいのですが、高いですか？

BACK INTO ENGLISH

I really want a white T-shirt, but is it expensive?

INTO JAPANESE

どうしても白いTシャツが欲しいのですが、高いですか？

BACK INTO ENGLISH

I really want a white T-shirt, but is it expensive?