什麼時候要+ing ??

總之是xx continuous tense的時候,verb 便要+ing
eg.
present continuous----------is,am,are + ing
past continuous-------------was,were + ing
另外 preposition之後的verb亦要+ ing
of,by,from,at,for是preposition,因此它們之後的verb要+ ing

you will find studying in Hong Kong interesting and exciting.
studying在這裡是作一個動名詞(gerund)，由於一個句子中不能同時有2個verb存在，因此便把原是verb的study轉成noun,即studying,這便是gerund動名詞。

有一些特定的動詞之後的動詞必須轉成gerund
such as:
love ,like ,hate,avoid , consider , deny, dislike , enjoy,finish , image, keep ,mention,mind,
practise, prohibit, resist ,stop, sugget , understand, suffer ,admit

動名詞（gerund）是動詞（verb）加上 “-ing”後而轉化成的名詞（noun）。要注意的是，動名詞雖然由動詞改變而成，但它的詞性屬名詞。換個說法，即一般句子中使用名詞的位置，我們都可以以動名詞取代。例如：
Examples:
Running is good exercise.
(Gerund used as a subject noun)（動名詞作為主語名詞）

Walking to school is a good idea.
My hobby is hiking.
(Gerund used as a direct object)（動名詞作為直接受詞[direct object]）

I reached him by calling his office.
(Gerund used as the object of a preposition)（動名詞作為連接介詞[preposition]的受詞[object]）

e.g. she denied having been there.
e.g. Try to avoid travelling in the rush hours.
e.g. would you consider emigrating?
e.g. most women enjoy shopping.

希望能幫到你!!!!!!!!!!!

其實係在現在進行;過去進行;將來進行式之後再+ing~!!!

現在進行式的時候用或'like'or'likes'要加ing.

當有介係詞時後面要+上 i n g

或者是現在進行式時(前面有be動詞時)

文章所說的是present tense就用present tense動詞就得ga喇

+ing 就指一個動作進行中
例如 :
mary is swimming [瑪莉正在游泳]

of,are,while,by,from,at,for, 後面的字要 +ing ??
呢個我唔係好明你咩意思

studying 點解要+ing ?
因為呢個唔係動詞,,只係一個名詞
解作[ 學習 ] ,同tense無關

希望幫到你