以下全是句型转换.请简要说明理由.现在就要.12点之前要.
Theyarerunningintheplayground.对arerunning提问
Thereisaletterinthepostbox对a提问
ThemanwithadogisMr.Liu对withadog提问
Turnthetapoffrightnow(opposite)
Thetyreisveryflat对veryflat提问
Theyarejumping(use"fight"towriteadoubleQ)