Breakdown of В таких случаях надо ждать.
в
in / to (direction)
ждать
to wait (imperfective)
надо
must, need to
такой
such / so / what ... is
Questions & Answers about В таких случаях надо ждать.
Why does случаях take the ending -ях instead of -ах?
The dictionary form is случай (case), which is a masculine noun ending in -й. In the prepositional plural, masculine nouns ending in -й take the soft ending -ях, while nouns ending in a regular hard consonant take -ах.
Why does таких end in -их rather than -ых?
This is the prepositional plural form of такой (such). The standard prepositional plural ending for adjectives is -ых. However, the 7-letter spelling rule says you can never write the letter ы after к, г, х, ж, ч, ш, or щ. Because of the к in такой, the ending must be spelled as -их.
How does the phrase надо ждать work without a subject like "you" or "we"?
The word надо is an impersonal word meaning "it is necessary" or "one must." To express a general rule about what people need to do, you simply combine надо with an infinitive verb like ждать (to wait). You don't need a subject!
Could we use the perfective verb подождать instead of the imperfective ждать here?
It's better to use the imperfective ждать here. The phrase В таких случаях (In such cases) shows that this is a recurring situation or a general rule. Imperfective verbs are used for repeated or habitual actions, whereas a perfective verb like подождать would be used for a single, specific, one-time instance of waiting.