（a） be 动词的过去式:
I/He/she/it was(not)…. You/we/they were….
一般疑问句was, were 放在句首。
（b） 动词过去式：
肯定句： I watched cartoons.
She visited the zoo.
一般疑问句： Did you read book last night? Yes, I did. No, I didn"t.
Did she clean the desk just now? Yes, she did. No, she didn"t.
否定句： They didn"t go the the part yesterday.
He didn"t make model ships last week.
(3)动词过去式的变化：
规则动词的变化：
Most verbs +ed eg. planted,watered,climbed。
Verbs ending in e +d eg liked。
Verbs ending in a consonant +y --y +ied eg : study-studied
Short verbs ending in a vowel + a consonant eg: stop --stopped
不规则动词的变化：
is/am-was,are-were,do-did,have/has-had,make-made,fly-flew/u:/
eat-ate,take-took,run-ran,sing-sang,drink-drank 等等
