动词过去式变化规则口诀如下：
1. 一般动词加-ed：
```
work -> worked
play -> played
visit -> visited
```
2. 以不发音的e结尾的动词加-d：
```
live -> lived
move -> moved
like -> liked
```
3. 辅音字母加y结尾的动词，将y变为i再加-ed：
```
study -> studied
carry -> carried
try -> tried
```
4. 重读闭音节动词，双写末尾的辅音字母再加-ed：
```
stop -> stopped
plan -> planned
```
5. 以c结尾的动词，将c变为ck再加-ed：
```
picnic -> picnicked
frolic -> frolicked
```
6. 不规则动词变化需要单独记忆：
```
be -> was/were
go -> went
do -> did
```
以上是英语动词过去式变化的规则口诀，希望对你有所帮助
