Questions & Answers about Đây là lệnh mới.
Đây means this or here, depending on context. In Đây là lệnh mới, it works like this in This is a new command.
A very common pattern in Vietnamese is:
Đây là ... = This is ...
So:
- Đây là sách. = This is a book.
- Đây là lệnh mới. = This is a new command.
Là is the word used to link two nouns or noun phrases, similar to is / am / are in English in sentences like This is... or That is...
So the structure is:
Đây + là + lệnh mới
This + is + a new command
However, Vietnamese does not always use là the way English uses to be. It is especially common when identifying or defining something.
For this sentence, là is completely natural and expected.