（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。
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.
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