あなたは泳げるしかしわたしは泳げません。

You can swim, but I can't swim.

あなたは泳(およ)げるしかしわたしは泳(およ)げません。

Anata wa oyogeru shikashi watashi wa oyogemasen.

貴方 (あなた)

you (referring to someone of equal or lower status); dear (what a wife calls a husband)

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

然し (しかし)

however; but

私 (わたし、わたくし)

I; me; private affairs; personal matter; secrecy; selfishness

Readings: エイ、およ.ぐ

Meaning: swim