我本来打算去的，因为坐公共汽车或火车要花很久，但是弗雷德决定自己开车去，并邀请我和他一起去。

I was planning to, because it's such a long trip by bus or by train, but Fred decided to drive and invited me to join him.

youdao

我本来打算去帮忙，但没有及时赶到那里。

I had wanted to help but could not get there in time.

youdao

我本来打算去听演讲，可是没料到有人来拜访我。

I was to have listened to the speech, but someone unexpected came to visit me.

youdao