会話が上手になるには、あまり間違いを気にせず、どんどん話してみることです。前半はタクシーに乗った時に使う一般的な表現です。後半の「〜Vはいけません」は何かを禁止する時に使えます。

To improve your conversation skill, it is important to speak as often as possible even if you make a mistake. In the first half, there are common expressions when you take a taxi. "〜Vはいけません", in the second half, indicates prohibition. It is useful if you've learned it.