swing的一般过去时为：swung...

swing的第三人称单数（三单）为：swings...

Huge cranes are swinging cargo up.巨大的起重机正在吊运货物.The stuffy "50s gave way to the swinging "60s.古板乏味的50年代被多姿多彩的60年代所取代。The bars are two round wooden bars used for such as swinging, vaulting, and handstands.双杠是两根圆形木制横杠,可做回环 ...

backswing的音标：backswing的英式发音音标为：['bækswɪŋ]backswing的美式发音音标为：[]...

Dieters suffer from violent mood swings.节食者会有激烈的情绪波动。golfers practising their swings练习挥杆动作的高尔夫球手...a place full of swings and amusements.装有秋千并设有许多娱乐活动的地方If the wind swings round, we will have to change the sails.如果风向突然变了...

upswinging的音标：...

upswings的音标：...

v.提高，进步，改进( upswing的第三人称单数 )...

v.提高，进步，改进( upswing的现在分词 )...

swing的现在完成时为：swung...