前面是a,例如:
1。A plane passed low overhead。一架飛機從頭上低空飛過。
2。A plane took off and banked above the highway in front of him。一架飛機起飛後在他前方的公路上空側飛轉向。
3。They were on a plane flying from London to New York。他們在從倫敦飛往紐約的飛機上。
plane前是a,只有發母音a e i o u才用an。如an apple。