He was used to go to work on foot,but now he takes a taxi to work.这个病句错在哪里?

去掉was
used to 是固定用法.表示过去常常做某事
be used to do,表示被用来做什么
be used to doing表示习惯于

应该是He used to go to work on foot,but now he takes a taxi to work.
把was去掉就对了
used to 是过去常常
be used to 是习惯于

He used to go to work on foot ,but now he is taking a taxi to work..

删was
be used to 习惯于
used to 过去常常

要去掉 was. used to 是过去常常的意思!!
be used to :习惯于..;被用于...

他以前习惯步行去上班，但他现在打车（乘出租车）去上班

此句如果分开来成为两句话那他是不错的，但现在他的错误是在于两个小短句没有注意前后呼应。
应改为：He was used to go to work on foot,but now he goes to work by taxi.

去掉was或者把go改为going

He was used to go to work on foot,but now he goes to work by taxi

He was used to go to work on foot,but now he takes a taxi to work.
毛病太多 了
used to 是过去常常作某事
be used to 是习惯于作某事
另外，he takes a taxi to work.也有问题
应该是he takes taxi to (go to)work.
He used to go to work on foot,but now he takes taxi to go to work.
他以前老走着上班，而现在他常打的去。

1 be used to do 被用于作什么
2 used to do过去 习惯作什么
3 be used to doing 习惯作什么

be used to 习惯于
used to 过去常常