The exercise A4, A5, and A6 introduce the sentence constructions in which a giving/receiving verb is used as a supplementary verb and attached to the behind of a verb in Te-form.
– [V-te]+[Giving/Receiving Verb].
“Itadaki mashita” in A4 is the humble language of “Morai mashita”, and “Kudasai mashita” in A5 is the honorific of “Kure mashita”. Both A4 and A5 are introducing a type of treatment expressions that are to be used in conjunction with a person who is superior to “Watashi”. In contrast, A6 introduces a treatment expression that has to do with a person who is inferior to “Watashi”.
1. Watashi wa Mago ni Kutsuhimo no Musubi kata o Oshiete Yari mashita.
(I taught my grandchild how to tie shoelaces.)
Mago : Noun ; grandchild
Kutsu-himo : Noun ; shoelaces
Musubu/Musubimasu : Verb (Group1-B) : tie
kata ; how to, the way to do something; [Masu-form without “masu”] + kata
Note that the verb “Oshieru/Oshiemasu” is a transitive verb which usually use two particles “-ni” and “-o” in the form of “[person]ni [something]o Oshieru”.
2. Watashi wa Mago o Umi ni Tsurete itte Yari mashita.
(I took my grandchild to the sea.)
3. Watashi wa Mago no Shukdai o Tetsudatte Yari mashita.
(I helped my grandchild’s homework.)
Tetsudau/Tetsudaimasu : Verb (Group1-W) : help, assit
The particles after “Mago” is “-ni” in the sentence 1, “-o” in the 2, and “-no” in the 3. “Mago(grandchild)” is a receiver in those three sentences. But the particle attached to “Mago” is not always “-ni”. When it comes to sentences of giving/receiving, many sentences have particles as below;
-[Person] ni [Thing] o [Giving/Receiving Verb].
For example,
– Satou-san ga Watashi<ni> Chokore’eto<o> Kure mashita. (Sato-san gave me a chocolate.)
Also, in the sentence of a treatment expression that is using giving/receiving verb as a supplementary verb behind a verb in Te-form,
– Watashi wa Suzuki-san<ni> Nihongo<o> Oshiete Morai mashita. (I was taught by Suzuki-san Japanese.)
But it is not always “[person]+ni” as shown in the sentence 2 and 3 above. When you need to choose particles for sentences of giving/receiving and/or treatment expressions, it is good to think that the particles in the core verb phrase are maintained. The core verb phrase of the sentence 2 is;
– Mago o Umi ni Tsurete iku (To take my grandchild to the sea)
Substituting this into “Watashi wa — Yari mashita.” then we get the sentence 2.
Likewise, the core verb phrase of the sentence 3 is;
– Mago no Shukudai o Tetsudau (To assist my grandchild’s homework)
Substituting this into “Watashi wa — Yari mashita.” then we get the sentence 3.
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This post was written with reference to the exercise A6 on Section41 of “Minna no Nihongo (2nd Edition)” published by “3A Corporation”