Bahasa Malaysia is Malaysia's national language and is formerly known as Bahasa Melayu (Malay language). It is not only spoken in Malaysia but is also widely spoken in Indonesia, Brunei and Singapore. Some people say that Bahasa Malaysia is an easy language. To a certain extent it is, but believe me, it is not so easy that you can afford to study it while listening to your favourite music at the same time!
The truth is there is no EASY language in the world. Everything is relative so when people say that Malay is an easy language what they really mean is that it IS easy when compared to studying a language like English, French or Mandarin, for example. Thus if you might need to spend at least 300 hours studying English, French or Mandarin before you are able to use it in a simple conversation, you need only spend say, 100 hours studying Malay before you are able to do so. This is because in Malay there is no past tense or past participles of verbs to study as in English, the verbs are not conjugated as in French and you don't have to worry about getting the tones right in order to be understood as you have to in Mandarin.
Lesson 16 Kalau..... (If.....)
Click to listen
A second reading (by Michelle Nor Ismat, a native speaker)
For those who want to know more:
Kalau hujan dia tak datang (see banner) is the colloquial form of Kalau hujan dia tidak akan datang
Note in passing that tak is the abbreviated form of tidak.
Note that in sentences two and three above anda (you) is not necessary as it is obvious you are referring to the person whom you are addressing.
The suffix lah in Kalau tidak faham tanyalah saya is meant to soften the tone so that it does not appear as a harsh order.
By the way the Malay suffix "lah" has infiltrated so widely into "Manglish" (Malaysian English) that no true Malaysian, however well-educated he might be in English, can do without it when speaking to fellow Malaysians. The very use of it ignites a kind of Malaysian intimity from which the foreigner (non-Malaysian) is excluded, as explained in this delightful article on "The Adorable Lah" by Lee Su Kim.