Mẹ dẫn bé đi.

It follows a very common Vietnamese pattern:

Subject + verb + object + directional/resultative word

So here you have:

• Mẹ = subject
• dẫn = main verb
• bé = object
• đi = adds the idea of going away / going along

A natural way to understand the structure is Mom leads/takes the child away.

On its own, đi means to go. After another verb, it often adds the idea of movement away or going somewhere as part of the action.

So:

• dẫn bé = lead/take the child
• dẫn bé đi = lead/take the child away, take the child along

In this sentence, dẫn is the main verb, and đi adds the sense of motion.

Yes. Mẹ dẫn bé is possible and means Mom leads the child.

But adding đi makes it sound more complete in a situation where they are actually going somewhere. It gives the sentence a stronger sense of movement.

Here bé is a noun meaning something like little child, young child, or little one. Depending on context, English might translate it as baby, toddler, or child.

Also, bé can be an adjective in other sentences, meaning small. But in Mẹ dẫn bé đi, it is functioning as a noun.

Vietnamese usually does not require articles like a or the. It also often leaves possession unstated when it is obvious from context.

So Mẹ dẫn bé đi can naturally mean things like:

• Mom takes the child away
• The mother takes the child away
• Her mother takes the child away

The exact English wording depends on context, but Vietnamese does not need to spell all of that out every time.

Not by itself. Vietnamese does not mark tense the way English does.

So Mẹ dẫn bé đi could be understood as present, past, or future depending on context. If the speaker wants to make time clearer, they can add words such as:

• đã for past
• đang for ongoing action
• sẽ for future

For example:

• Mẹ đã dẫn bé đi = Mom took the child away
• Mẹ đang dẫn bé đi = Mom is taking the child away
• Mẹ sẽ dẫn bé đi = Mom will take the child away

They can do both in Vietnamese.

• mẹ can mean mother / Mom, and family terms are often used the way English uses names or pronouns in conversation.
• bé can mean little child / little one, and it can also be used as a way to refer to or address a child.

In this standalone sentence, though, the most natural reading is simply literal: Mom is taking the child away.

Yes. d and đ are different letters in Vietnamese, and they are pronounced differently.

• đ in đi is pronounced like an English d
• d in dẫn is different:
  • in Northern Vietnamese, it sounds like z
  • in many Southern accents, it sounds more like y

So the two words do not begin with the same sound.

This is a very common thing for English speakers to notice, because d and đ look similar but are separate letters.

Each syllable has its own tone:

• Mẹ has the nặng tone: low and short, with a clipped quality
• dẫn has the ngã tone in standard Northern pronunciation: broken or creaky, then rising
• bé has the sắc tone: rising
• đi has the ngang tone: level

So even if the consonants and vowels are correct, the tones still matter. Changing the tone can change the word entirely.

These verbs are related, but they are not exactly the same.

• dẫn = lead, guide, take along
• đưa = take/bring someone somewhere, more general
• dắt = lead by the hand, or lead an animal; often more physical

So Mẹ dẫn bé đi suggests that Mom is leading or taking the child along. If you said Mẹ dắt bé đi, it could suggest more direct physical leading, especially with a small child. If you said Mẹ đưa bé đi, it would sound more general, like taking the child somewhere.

All three can be possible in the right context, but dẫn emphasizes guiding or leading.