Hi, @Anglophile, @Andrea @Torsten @Alan
I that 'the least you can/do is an idiom, but I would to like ask what you think of the following sentences:
- The least you can do is write him a letter./ The least you can do is to write him a letter.
- The least you could do is write him a letter/ The least you could do is to write him a letter.
- The least you could have done was write him a letter/ The least you could have done was to write him a letter.
I’ve heard and read sentences of both versions, but which ones sound the most natural or are they all acceptable?