关于元音连读中间加的半元音问题~~

1.当前面一个单词元音是/i/结尾时,后一个单词元音之前隐隐加入一个半元音/j/,例如
When will you come back to the office?(the + j + office)
What did they say about it?(say + j + about)
2.除第1条情形之外,两个单词的元音之间连读通常隐隐加入一个半元音/w/,例如
How are you?(how +w +are)
Can you ask him why?(you+w+ask)