181. through, across　　

through穿越空間；例：through the forest
across在…上穿過(guò) 例：across the desert

182. on the way, in the way　　

on the way在前往…的路上；
in the way擋路 例：The chair is in the way.

183. above, on, over　　

above在上面，不接觸；
on在上面，接觸；
over在正上方 例：fly over the hill

184. until, not…until　　

until到…為止；例：I waited until 3:00.
not…until直到…才（常跟點(diǎn)動(dòng)詞連用）例：He didn't come until 3:00.

185. besides, except, except for　　

besides除了…還（包括在內(nèi)）；
except除了（不包括在內(nèi)）；
except for整體…除了某一點(diǎn)以外 例：The composition is good except for a few spelling mistakes.