Those words use sound insulation symbols

Those words use sound insulation symbols

The symbol (') specified in the scheme of Chinese phonetic alphabet should be placed in front of a, O and e when necessary, so as to make the boundaries of syllables clear and avoid confusion. For example: fur coat P í'ǎ o, Xi'an x ī'ā n
Most syllables in putonghua have consonant initials. The spelling habit of Chinese pinyin is that consonants are always combined with the following vowels to form syllables, such as shange, which can only be read as Shan Ge. Only when there is no vowel behind, can consonants be combined with the preceding phonemes, such as Shang, Consonant initials play the role of indicating syllable boundaries. Zero vowels starting with I, u and ü use y and w to indicate syllable boundaries, and the remaining zero vowels starting with a, O and E are easy to be confused with the boundaries of the preceding syllables
The sound insulation symbol is indicated by "'". When the zero vowel at the beginning of a, O and E is written after any syllable, the sound insulation symbol is marked at the top left of the initial letters of the syllable. For example: Fan'an fanfan'an scheme Sheng ou ming'e Xi'an ku'ai loves yu'e yu'pi'ao fur coat

In the following three words, the sound insulation symbol between two syllables is ()
1、ku ai 2、da jiao 3、zi xun

1. We also do it. When the syllable beginning with (a, O, e) is connected after other syllables, if the boundaries of syllables are confused, use the sound insulation symbol ('), such as pi'ao (fur coat) "

Add different tones to the following syllables to make several different words. Please write them down
（1）jian yi (2）jian yi （3）jian yi
（ ） （ ） （ ）

Simple and resolute advice
jiàn yì jiǎn yì jiān yì