offered 发[d]音
provided发[id]音
单词加ed后的发音:
1.以清辅音结尾(不包括在词尾发音的 t 和 d), 加了-ed后,发/t/.
2.以元音或浊辅音结尾的,加了-ed后, 发/d/.
3.结尾是发音的 t 或 d,加了-ed后,发/id/.
规则动词的过去式由“动词原形+-ed”构成,具体变化有:
1. 直接在词尾加-ed。如: want—wanted, work—worked, need—needed, clean—cleaned
2. 以不发音的e结尾的在词尾加-d。如:like—liked, live—lived, use—used, move—moved
3. 以一个元音字母加一个辅音字母结尾的重读闭音节动词,先双写结尾的辅音字母,再加-ed。如:stop—stopped, trip—tripped
4. 以辅音字母加y结尾的动词,先把y变成i,再加-ed。如:study—studied, carry—carried, hurry—hurried, marry—married
不规则动词的过去式见课本后的不规则动词表。大体上归纳有以下六条记忆法:
1. 以t结尾的词,过去式与原形相同。如:put—put, let—let, cut—cut, beat—beat
2. 以d结尾的词,把d变成t。如:build—built, lend—lent, send—sent, spend—spent
3. 以n结尾的词,在词后加t。如:mean—meant, burn—burnt, learn—learnt
4. 以ow / aw结尾的词,把ow / aw变成ew。如:blow—blew, draw—drew, know—knew, grow—grew
5. 含有双写字母的词,将双写改为单写,在词尾加t。如:keep—kept, sleep—slept, feel—felt, smell—smelt
6. 含有元音字母o / i的词,将o / i变成a。如:sing—sang, give—gave, sit—sat, drink—drank
规则动词词尾加-ed有三种读音:
1. 在清辅音后读作[t]。如:asked, helped, watched, stopped
2在浊辅音和元音后读作[d]。如:enjoyed, studied, moved, called
3. 在t / d后读作[id]。如:wanted, needed