Past participles of most of the weak verbs are formed as follows:
ge + stem + t as in gemaakt
ge + stem + d as in gewoond

-t is added to stems ending in p, t, k, s, f, ch.
infinitive (stem) → past participle
hopen (hoop) → gehoopt
praten (praat) → gepraat
koken (kook) → gekookt
missen (mis) → gemist
blaffen (blaf) → geblaft
kuchen (kuch) → gekucht

In Di3M they offer to memorize  p, t, k, s, g, ch using the mnemonic of ‘t kofschip.
However, I find it easier to memorize the mnemonic offered by dutchgrammar.com
which is pocket fish 🙂

Spelling note: Doubled consonants never appear in the end of the Dutch words, so if a stem already ends in “t”, no extra -t should be added. See “praten → gepraat” in the list above.

All the other weak verbs add -d to the stem:
horen (hoor) → gehoord
bellen (bel) → gebeld
branden (brand) → gebrand

Spelling note: a second -d should not be added if a stem ends in “d”.
See “branden → gebrand”.

Weak verbs which have prefixes be-, er-, ge-, her-, ont- and ver- do not form their past participles with the prefix ge-. These verbs are called inseparable, and their prefixes are also called inseparable. However, either -d or -t is still added in the end of a stem:
bedoelen (bedoel) → bedoeld

n case if a stem ends in “d” or “t” the past participle matches the stem in spelling:
verbranden (verbrand) → verbrand

pocket fish rule doesn’t work with the verbs which have a “v” or a “z” in infinitive and the stem ending in -f or -s. In these cases -d should be used to form the past participle and not -t:
geloven (geloof) → geloofd
verhuizen (verguis) → verhuisd

1. The main verb must always be the second item in a sentence.
2. The position of the subject may vary. It might be the first or the third.
3. The rest of the items always follow this order: time, manner, place. So the time of the even is specified, then the manner of the event (i.e. in what way something is done) and the last item specifies the place or destination.

De jongen gaat vanavond met de trein naar Amsterdam.

It is possible to start a sentence with items other than the subject. For example, with an expression of time:

Vanavond gaat de jongen met de trein naar Amsterdam.

Notice that even though de jongen is now item 3,
the overall order of time, manner, place remains.

I’ve started doing the revision exercises from the 6th unit of Di3M and realized that I need to revise the rules first, as there are a couple.

Negating with nee and niet.

nee — no
niet — not

Niet often is often put in the end of the sentence:
Nee, ik drink niet.
Ik zie de man niet.

But here are the cases when niet  doesn’t happen to be the last word.

1. Niet always precedes a preposition:
Hij woont niet in Amsterdam

2. Niet always precedes an adjective which follows the noun:
Het huis is niet groot.

3. Niet always precedes binnen, buiten, beneden, boven and  thuis.
De kinderen spelen niet boven.

Negating with geen.

The word geen is used to replace the an indefinite article:
Ik heb een peen → Ik heb geen pen.

Geen is also used with the uncountable things like water, wijn, bier and such:
Ik drink wijn → Ik drink geen wijn.