臺灣是很好看!

上週我去了台灣，。我想學中文。

＃The accuracy of punctuation marks is important in a sentence.

# You can more describe how you feel about the weather, landscape, and people.

臺灣很漂亮!

上週我去了台灣。我想學中文。

臺灣是風光好很好看!  What you wrote is, "Taiwan is good to look at".  I am sure you wanted to say, "Taiwan is beautiful = 臺灣好美麗".  What I corrected is, "Taiwan's scenery are great/beautiful"

上週我去了台灣。我想學中文。

臺灣是很好看好美啊!

上週我去了台灣，我發現臺灣好漂亮啊，讓我好想學中文。

臺灣是很美!

上週我去了台灣。我想學中文。