原形 - 三单形式 - 过去式 - ing形式
arrive - arrives - arrived - arriving
ask - asks - asked - asking
bring - brings - brought - bringing
carry- carries - carried - carrying
clean - cleans - cleaned - cleaning
come - comes - came - coming
do - does - did - doing
eat - eats - ate - eating
enjoy - enjoys - enjoyed - enjoying
get - gets - got - getting
一、动词第三人称单数形式的变化规则：
规则变化：
1）、一般在词尾加s,如 arrive - arrives
2)、以s , x ,ch ,sh ,o 结尾的，在后面加es ,如 pass - passes , fix - fixes ; watch- watches ; wash - washes ; do - does
3)、以辅音字母加y结尾的词，先把y改为i再加es , 如 carry - carries
2. 不规则变化 be - is ; have - has
二、动词过去式的变化规则：
规则变化：
1)、一般在词尾加ed ,如 learn - learned
2)、以不发音字母e 结尾，直接加d ，如 close - closed
3)、以辅音字母加y 结尾，先把y 改为i 再加ed , 如 carry - carried
4)、 以重读闭音节结尾且只有一个辅音字母，先双写辅音字母再加ed，
如 stop - stopped
2. 不规则变化：（熟记不规则变化表）
三、动词ing的变化规则：
1、一般在词尾加ing ，如 carry - carrying
2、以不发音字母e 结尾，去掉e 再加ing，如 have- having
3、以重读闭音结尾且只有一个辅音字母，先双写这个辅音字母再加ing，
如 stop- stoping ; swim - swimming
4、 以ie结尾，把ie 变为y 再加ing ，如 die - dying ; lie - lying ; tie - tying
arrives, arrived, arriving
asks, asked, asking
brings, brought, bringing
carries, carried, carrying
cleans, cleaned, cleaning
comes, came, coming
does, did, doing
eats, ate, eating
enjoys, enjoyed, enjoying
gets, got, getting