Japanese Class ( easy to, hard to)

V (Masu-Stem) + やすい　(easy to verb) V (Masu-Stem) + にくい (difficult or hard to verb)

but, however , though, although （でも、しかし、けど、けれども） Watermelon is big, but strawberry is small Although Japanese is hard to learn, English is easy to learn. He is really rude, but his sister is kind and gentle.