Если бы он умел кататься на лыжах,

Если бы он умел кататься на лыжах, он бы не остался в городе, когда мы ездили в лес.

Результаты (английский) 1:

If he knew how to ski, he would not have stayed in when we went into the Woods.

Результаты (английский) 2:

If he knew how to ski, he would not have remained in the city, when we went into the woods.

Результаты (английский) 3:

if he knew how to ski, he wouldn"t stay in town, when we went into the forest.