自己归纳的
1.be + doing （进行时） be always doing (感情色彩)
2.动词作主语，开头，用doing
3. 介词 in/ at/ for/of /by / about/ with/ without / after/ before /including /against/ towards+ doing
Be / get used to doing (习惯于…) look forward to doing（期待）
prefer doing to doing
4. speaking / listening skill writing paper swimming club singing class
5.There be …doing (主动) There be…+p.p.(被动)
6. have trouble / problem / fun /…time doing
7. 感官动词 see / hear/ notice/ find / feel sb. doing (正在做)
8.put off doing practice doing consider doing keep doing keep sb. doing
finish doing enjoy doing mind doing allow doing give up doing
be busy doing spend…(in) doing end up doing stop doing(停止做)
try doing（试着做）forget doing（忘了做过某事） remember doing（记得做过某事）
追问虽然是动词加ing，可是在什么适当的情况下加ing呢，有些要加有些不加，有点搞不懂
追答我给你的都是要加的， 记住那些情况加ing， 其他情况不加ing，需要加原形或者to do
追问虽然是动词加ing，可是在什么适当的情况下加ing呢，有些要加有些不加，有点搞不懂
追答Ｉ ｆｉｎｉｓｈｅｄ ｄｏｉｎｇ ｍｙ ｈｏｍｅｗｏｒｋ ｆｉｎｉｓｈ后面就要加动词ｉｎｇ
Ｗｈａｔ ａｂｏｕｔ ｇｏｉｎｇ ｔｏ ｔｈｅ ｍｏｖｉｅｓ？ ａｂｏｕｔ介词后加动词ｉｎｇ
上面给你列的就是这些情况
追问watvhing TV 为啥要加ing，不加会改变意思么
追答Ｉ like watching TV Watching TV is my favorite （作主语） What about watching TV?
I ｆｉｎｉｓｈｅｄ ｗａｔｃｈｉｎｇ ＴＶ 等，这些需要用ｗａｔｃｈｉｎｇ。 意思还是看电视