Colloquial Vs. Formal

[vcolts]

We often hear sentences like these:


All we can do is hope for the best.

All we can do is try.

All you can do is wait and see.


I believe these are examples of colloquial writing, as the grammatically correct way would involve participles or gerunds, right?


Thanks in advance.

[5jj]

No. They are fine as they are; and they are not particularly informal

[Barb_D]

I'm curious what you suggest is the correct way.

All we can do is hoping and waiting? That's not correct.