动词的现在分词变化，不规则变化的有哪些？

swimming
sitting
running
travelling
stopping

1、以重读闭音节结尾，末尾只有一个辅音字母的动词，要双写这一辅音字母，再加-ing。例如：run-running, swim-swimming等。

2、以-al,-er,-ill结尾的动词，即使重音不在最后一个音节上，也要双写，再加-ing 如：travelling等

baby-sit充任临时保姆 baby-sat baby-sat
be(am/is/are)是 was/were been
beat 击打 beat beaten
become 变成 became become
begin 开始 began begun
bend 使弯曲 bent bent
bet 赌 bet bet
bite 咬 bit bitten/bit
blow 吹 blew blown
break 打破 broke broken
bring 拿来 brought brought
build 建造 built built
burn 燃烧 burnt/burned burnt/burned
buy 买 bought bought
can 能 could
cast 抛 cast cast
catch 捕捉 caught caught
choose 选择 chose chosen
come来 came come
cost花费 cost cost
cut割 cut cut
deal 分配 dealt dealt
dig挖 dug dug
do /does做 did done
draw画 拉 拖 drew drawn
dream 做梦 dreamed/dreamt dreamed/dreamt
drink 喝 drank drunk
drive驾驶 drove driven
ea