How to express an exception, being able to do sth. normally, but not today?


I want to express an exception and don't know which sentence would be
appropriate. I want to say that I just wasn't able to do it today, but I am
able to do it normally. Which of the following sentences has got this meaning;
or are there better ways to say this?

(I guess some of these sentences actually mean the opposite, `I am not able to
do it, as always.`)

  * いつものように出来ない
  * いつもみたいに出来ない
  * いつも通りに出来ない

Or maybe one of these sentences?

  * いつものようには出来ない
  * いつもみたいには出来ない
  * いつも通りには出来ない

I guess that `いつも通りに(は)出来ない` is alright, but I am not certain. Also, maybe
these sentences in the past tense would make it easier, but I wanted to try it
with the present tense.

Also, adding a `今日は` to the sentences could make it easier, too, I guess.




Your first set of three sentences without 「は」 used in them **_could_** mean
two very different things. This represents one of the soft spots of informal
Japanese today.

> 1) "I am being unable do it (today) as good as I usually do." Today is an
> exception.
>
> 2) "As usual, I could not do it (today)." Today is no exception.

**By adding 「は」** as you did in your second set of three sentences, the
semantic ambiguity instantly disappears and the sentences can now mean only
one thing:

> "I am being unable to do it (today) as good as I usually do."

One can easily (and naturally) express the same idea by adding 「に[限]{かぎ}って」:

> 「[今日]{きょう}に[限]{かぎ}って、いつものように/いつもみたいに/いつも[通]{どお}りにできない。」

By using 「限って」, you can drop the 「は」.

(Lastly, it is officially 「できない」, not 「出来ない」.)




Your first set of three sentences without 「は」 used in them **_could_** mean
two very different things. This represents one of the soft spots of informal
Japanese today.

> 1) "I am being unable do it (today) as good as I usually do." Today is an
> exception.
>
> 2) "As usual, I could not do it (today)." Today is no exception.

**By adding 「は」** as you did in your second set of three sentences, the
semantic ambiguity instantly disappears and the sentences can now mean only
one thing:

> "I am being unable to do it (today) as good as I usually do."

One can easily (and naturally) express the same idea by adding 「に[限]{かぎ}って」:

> 「[今日]{きょう}に[限]{かぎ}って、いつものように/いつもみたいに/いつも[通]{どお}りにできない。」

By using 「限って」, you can drop the 「は」.

(Lastly, it is officially 「できない」, not 「出来ない」.)

