drop behind
phrasal verbwithdropverbuk/drɒp/us/drɑːp/-pp-
to getfurtherbehind or away from something or someone:
落后，掉队，跟不上As thepacequickened, Pepebegantodropbehind.随着速度的加快，佩佩开始跟不上了。
Shestoppedgoing toclassesanddroppedbehind in herschoolwork.她不去上课，功课也就落了下来。
Slow and moving slowly
- (as) slow as molassesidiom
- at a snail's paceidiom
- by and byidiom
- by degreesidiom
- clawyourway(somewhere)idiom
- drift
- float
- infiltrate
- infiltration
- jog
- labour
- lag
- laggard
- laggy
- sluggishness
- snail
- steadily
- steadiness
- steady
- struggle