Questions & Answers about zuówǎn wǎngluò bù wěndìng.
In Mandarin, time words often come near the beginning of the sentence, before the thing being talked about.
So:
- 昨晚 网络 不 稳定。
- literally: Last night, the network was not stable.
This is very natural Chinese word order.
English often puts the time expression at the end, but Chinese very often places it earlier.
A common pattern is:
Time + topic/subject + comment
So here:
- 昨晚 = last night
- 网络 = network / internet connection
- 不稳定 = not stable / unstable
They are very close in meaning.
- 昨晚 = last night
- 昨天晚上 = yesterday evening / last night
昨晚 is shorter and very common in everyday speech.
昨天晚上 is a little fuller and slightly more explicit.
In this sentence, both work:
- 昨晚网络不稳定。
- 昨天晚上网络不稳定。
Both are natural.