Grammar Czechs Actually Use

No change in 1st person singular

Also unchanged - the singular forms are stable

The standard 1st person plural conditional

The one real change in this table. Bysme is the form most Czechs use in speech, educated speakers included

In context: Šli bysme na pivo? (Shall we go for a beer?). In practice people more often say Nepůjdem na pivo? or simply Dáme pivo?

Stays the same - the -ste ending is already the pattern that bysme follows

Standard instrumental plural ending -mi

The -mi → -ma shift - one of the most consistent obecná changes

Longer forms get -ema instead of just -a: přáteli → přátelema

Masculine hard stems add -ama: kluky → klukama

Even demonstrative pronouns follow the -mi → -ma pattern

Even neuter nouns get -ama in obecná: the -ma ending spreads to all genders

Standard 1st person -uji ending for -ovat verbs

The -uji → -uju shift: the final -i becomes -u. Since the 1993 spelling rules pracuju has been a standard variant too; pracuji is the more formal choice.

The bookish form: written usage still favours it, but in speech it sounds formal

Now dictionary-standard alongside mohu - obecná won this battle

Standard infinitive ending -ci for consonant-stem verbs

Shorter infinitive: -ci → -ct (pomoct, péct, moct). Since 1993 these are standard too, and pomoci or péci now sound bookish.

Dropping the final -l in masculine past participles - very colloquial, common in fast speech