Magsampay muna tayo ng pantalon at damit sa likod ng bahay.

Yes. Sampay refers to hanging clothes up to dry, or the clothes being hung out. With mag-, magsampay means to hang laundry / to put clothes out to dry.

So this is more specific than the English verb hang. In this sentence, it strongly suggests doing the laundry-hanging chore, not just hanging something in general.

This is about focus/voice, which is very important in Filipino.

• Magsampay is actor-focus: the sentence highlights the doer(s).
• Isampay is object-focus: the sentence highlights the thing being hung.

In Magsampay muna tayo ng pantalon at damit..., the focus is on us doing the action, so magsampay is natural.

If you wanted an object-focus version, you could say something like:

Isampay muna natin ang pantalon at damit sa likod ng bahay.

That also sounds natural, but the structure changes:

• magsampay ... ng pantalon
• isampay ... ang pantalon

So both can be correct, but they organize the sentence differently.

Not exactly in the English sense of a simple future tense.

In this sentence, magsampay is the base/infinitive-like form used in a suggestion or invitation, especially with tayo. So Magsampay tayo is very much like:

• Let’s hang the clothes
• Let’s go hang the laundry

It is not the usual marked future form. A more clearly future/contemplated form would be:

Magsasampay tayo...

So here, magsampay functions more like a let’s do X form than a plain future.

Muna usually means something like:

• first
• for now
• in the meantime

In this sentence, it suggests: Let’s hang the pants and clothes first
or
Let’s hang the clothes for now

It often implies that this should be done before something else, whether or not that other action is stated.

It can also make the sentence sound a little softer and more natural, rather than too abrupt.

Because tayo includes the person being spoken to.

• tayo = we, including you
• kami = we, excluding you

So Magsampay muna tayo... means Let’s hang the clothes first, where the speaker is including the listener in the action.

If you used kami, it would mean we (but not you), which would not fit a let’s... idea.

They are related, but they do different jobs here.

1. ng pantalon at damit

This ng marks the non-focus object of the actor-focus verb magsampay.

So:

• magsampay ng pantalon at damit = hang pants and clothes

2. likod ng bahay

Here, ng links two nouns, like of in English.

• likod ng bahay = back of the house

So the first ng is connected to the verb-object structure, while the second ng connects one noun to another noun.

Because Filipino often leaves nouns unmarked for number unless plurality needs to be emphasized.

So:

• pantalon can refer to pants/trousers
• damit can mean clothes/clothing or a garment, depending on context

In many real sentences, speakers do not need to add mga if the meaning is already clear.

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

• mga pantalon
• mga damit

But the original sentence is still natural without mga.

It breaks down like this:

• sa = location/direction marker, often in / at / to / on
• likod = back or rear
• ng bahay = of the house

So literally it is: at the back of the house

This is a very common Filipino pattern:

• sa harap ng bahay = in front of the house
• sa loob ng bahay = inside the house
• sa tabi ng bahay = beside the house

Because muna very often comes right after the verb.

So the most natural order is:

Magsampay muna tayo...

This is a very common Filipino pattern:

• Kain muna tayo.
• Upo muna kayo.
• Pahinga muna ako.

Placing muna later is sometimes possible in conversation, depending on emphasis, but verb + muna + pronoun is a very common and natural order.

A little, if translated very literally into English, but it can still sound natural in Filipino.

The speaker may mean:

• pants and other clothes
• the pants and the clothes
• the trousers and garments we need to hang

Filipino often allows this kind of wording without it sounding as strange as it might in English. Context usually tells you whether damit is being used broadly as clothing in general or more specifically as other garments.

Yes. A few natural alternatives are:

• Magsampay tayo muna ng pantalon at damit sa likod ng bahay.
• Sa likod ng bahay muna tayo magsampay ng pantalon at damit.
• Isampay muna natin ang pantalon at damit sa likod ng bahay.

These are all understandable, but they differ slightly in focus or emphasis.

The original sentence is a very natural way to say it if the speaker wants a straightforward Let’s do this first kind of feeling.