I often see this word "happen" in the article but frankly speeking I am not totally understand how to use it correctly. Today I was trying to figut it out. My studying today as follows:
Happen is only a INTRANSITIVE verb. Its is crucial that you must know it is an INTRANSITIVE. Knowing it can avoid grammer mistake. For example , we know that there is no object following the intransitive. so , if you know the word "happen" is an intransitive, you won't add an object following the word "happen" except this word " to". The explanation as follows:
the "to" should follow the word "happend" to express
1) do something by chance: to do something by chance and without a previous plan". Chiness means "碰巧"
For example1 : If you happen to see him, give him these keys.
2) occur by chance: to occur or exist by chance
For example1 : It happened to be the last one in the store.
The trading happened to get executed. (Complete: The trading system had a problem on that day and the trading happened to get executed.
From magazine :
Mandarin was not always so trendy. It is daunting to learn, especially for westerners, because of the tones used in speech to shift meaning - to say nothing of the thousands of characters that must be memorized to achieve true literacy.
on my own way :
中文以前並沒有那麼流行,它非常難學,尤其對西方人來說尤為困難,因為說話要靠四聲來改變字的意義---- 要背下數以千計的方塊字才能真正識字. Mandarin was not always so fashionable. It is very difficult to learn, especially for westerners, becasue they have to mermorize the thousands of characters to achieve true literacy. The pronunciation is the most difficult for them. Mandarin has four tones - the tones to shift meaning.