kono suihanki ha mae no yori sizukade, yakan mo sugu atuku narimasu.

前のより means than the previous one.

A more literal breakdown is:

• 前 = before / previous
• の = turns 前 into the previous one
• より = than

So in this sentence, 前の is standing in for a noun that is omitted because it is obvious from context. It probably means something like:

• 前の炊飯器より = than the previous rice cooker

Japanese often leaves out repeated nouns when they are easy to understand.

The pattern is:

• A は B より adjective
• A is more adjective than B

In this sentence:

• この炊飯器は = as for this rice cooker
• 前のより = than the previous one
• 静か = quiet

So:

• この炊飯器は前のより静か
  = This rice cooker is quieter than the previous one

Notice that Japanese comparative sentences do not need a word like more. The particle より already shows the comparison.

Because 静か is a na-adjective, not an i-adjective.

Japanese adjectives are often taught in two main groups:

• i-adjectives: 高い, 安い, 熱い
• na-adjectives: 静か, 便利, きれい

So quiet is:

• 静か

Not:

• 静い ❌

When used before a noun, it becomes:

• 静かな炊飯器 = a quiet rice cooker

When used at the end of a sentence:

• 炊飯器は静かです = The rice cooker is quiet.

静かで is the te-form-like connective form of the na-adjective 静か.

It is used here to connect two parts of the sentence:

• この炊飯器は前のより静かで、
• やかんもすぐ熱くなります。

So it works like:

• This rice cooker is quieter than the previous one, and...

For na-adjectives, this connecting form is made with で:

• 静かで
• 便利で
• きれいで

So 静かで means quiet, and... / being quiet, ...

It is not the polite ending です. It is a connector.

も means also or too.

So:

• やかんも = the kettle also

It shows that the kettle is being added as another point in the description.

The sentence is doing two things:

1. saying the rice cooker is quieter than the previous one
2. adding that the kettle also gets hot quickly

So も gives the feeling of in addition.

Depending on context, it may imply something like:

• And the kettle gets hot quickly too
• The kettle also heats up quickly

This is the pattern:

• adjective in く-form + なる
• to become ...

Since 熱い is an i-adjective:

• dictionary form: 熱い = hot
• adverbial/connecting form: 熱く
• plus なる = become

So:

• 熱くなる = to become hot
• 熱くなります = becomes hot / gets hot

This is a very common pattern:

• 安くなる = become cheaper
• 高くなる = become more expensive / higher
• 早くなる = become faster
• 暑くなる = become hot (weather)

So やかんもすぐ熱くなります means the kettle gets hot quickly.

Grammatically, やかんが/は熱くなる means the kettle becomes hot.

So the sentence is literally talking about the kettle itself heating up.

In real life, depending on context, a speaker may be loosely referring to the kettle heating up as part of its function, and the English translation might sound more natural as the kettle heats up quickly.

If someone wanted to talk specifically about the water becoming hot, they might mention:

• お湯がすぐ熱くなる or more naturally
• お湯がすぐ沸く = the water boils quickly

But as written, やかんもすぐ熱くなります is about the kettle becoming hot.

すぐ means quickly / soon / right away.

Here it modifies the action/state change:

• すぐ熱くなります = gets hot quickly

Japanese adverbs often come before what they modify, so this placement is very natural.

You could think of the structure as:

• やかんも = the kettle also
• すぐ = quickly
• 熱くなります = becomes hot

So the word order is very normal Japanese word order.

なります is the polite non-past form of なる.

That can mean:

• gets hot
• will get hot
• becomes hot

depending on context.

In a sentence like this, it usually describes a general characteristic or repeated behavior:

• The kettle gets hot quickly
• The kettle heats up quickly

If it were:

• 熱くなった = got hot / became hot
  • one completed past event

If it were:

• 熱くなる = plain form, less polite

So なります is just the polite style that matches a neutral statement about how the appliance behaves.

Both can be okay.

• 前のより = than the previous one
• 前のものより = than the previous thing/one

Japanese very often omits もの or the repeated noun when it is obvious.

So in everyday speech, 前のより sounds natural and efficient.

If you want to make it more explicit, you could say:

• 前の炊飯器より = than the previous rice cooker

But the shorter version is very common.

は marks この炊飯器 as the topic:

• この炊飯器は = as for this rice cooker

It sets up what the speaker is talking about. Then the sentence gives information about it:

• it is quieter than the previous one
• and the kettle also gets hot quickly

So は does not simply mean is. It marks the topic of the sentence.

A very literal structure is:

• As for this rice cooker, it is quieter than the previous one...

This is one of the most basic and common uses of は in Japanese.