be动词后面必定加ing吗？还有什么情况（like除外）

be动词(is.am.are).介词后面加ing形式。还有固定的词组搭配要记住
某些动词后出现非限定性动词时只能用动名词作宾语，不能用不定式。常见的此类动词有：advise, allow, permit, avoid, consider, enjoy, finish, give up, cannot help, imagine, include, keep, keep on, mind, miss, put off, delay, practise, resist, suggest, depend on, think about, set about, succeed in, worry about, burst out, insist on, can’t stand, be used to, get used to, devote…to…, look forward to, pay attention to, get down to等。如：

They went on walking and never stopped talking. 他们继续走，说个不停。

I found it pleasant walking along the seashore. 在海滩上走真是乐事。

（2）作介词的宾语

We are thinking of making a new plan for the next term. 我们正考虑为下学期制定新的计划。

Shall we have a rest or get down to doing our work? 我们休息呢还是开始干活？

（3）作形容词的宾语

The music is well worth listening to more than once. 这种曲子很值得多听几遍。

We are busy preparing for the coming sports meet. 我们正为马上到来的运动会忙着做准备。

3、作表语

动名词作表语时句子主语常是表示无生命的事物的名词或what引导的名词性从句。表语动名词与主语通常是对等的关系，表示主语的内容，主语、表语可互换位置。

Your task is cleaning the windows. 你的任务就是擦窗户。(Cleaning the windows is your task.)

What I hate most is being laughed at. 我最痛恨的就是被别人嘲笑。 (Being laughed at is what I hate most.)

4、作定语

动名词作定语往往表示被修饰词的某种用途。如：

a walking stick ＝a stick for walking=a stick which is used for walking

a washing machine=a machine for washing=a machine which is used for washing

a reading room=a room for reading=a room which is used for reading

a measuring tape=a tape for measuring=a tape which is used for measuring

sleeping pills=pills for sleeping=pills which is used for sleeping

be动词(is.am.are).介词后面加ing形式。还有固定的词组搭配要记住
某些动词后出现非限定性动词时只能用动名词作宾语，不能用不定式。
They went on walking and never stopped talking. 他们继续走，说个不停。

I found it pleasant walking along the seashore. 在海滩上走真是乐事。

（2）作介词的宾语

We are thinking of making a new plan for the next term. 我们正考虑为下学期制定新的计划。

Shall we have a rest or get down to doing our work? 我们休息呢还是开始干活？

（3）作形容词的宾语

The music is well worth listening to more than once. 这种曲子很值得多听几遍。

We are busy preparing for the coming sports meet. 我们正为马上到来的运动会忙着做准备。

3、作表语

动名词作表语时句子主语常是表示无生命的事物的名词或what引导的名词性从句。表语动名词与主语通常是对等的关系，表示主语的内容，主语、表语可互换位置。

Your task is cleaning the windows. 你的任务就是擦窗户。(Cleaning the windows is your task.)

What I hate most is being laughed at. 我最痛恨的就是被别人嘲笑。 (Being laughed at is what I hate most.)

4、作定语

动名词作定语往往表示被修饰词的某种用途。如：

a walking stick ＝a stick for walking=a stick which is used for walking

a washing machine=a machine for washing=a machine which is used for washing

a reading room=a room for reading=a room which is used for reading

a measuring tape=a tape for measuring=a tape which is used for measuring

sleeping pills=pills for sleeping=pills which is used for sleeping

你是问be后面接动词的时候吧，
1.be（am,is,are）+ving（现在分词）构成现在进行时态，表示现在正在发生的事情或动作，谁正在做什么。
2.be(was,were)+ving(现在分词)构成过去进行时态，表示过去某个时间正在发生的事情或动作，谁当时正在做什么。
3.be（am,is,are,was,were）+ved（过去分词）构成被动语态，It was made by English in 1880.它是1880年由英国人制作的。

be做系动词时后面可以接adj.形容词构成系表结构,It is sunny today.今天是晴天.He is naughty.他很调皮.
这样写能看明白吗?希望能帮到你!

不是
be动词后面如果出现谓语动词，则必定加ing，变为动名词形式，因为一个句子不可能存在超过一个谓语动词。
be动词后加动词ed形式，见于被动语态。

be的后面可以加名词，形容词
要是动词的话，就只能加动词ing（表示正在）或动词过去分词，既ed（表示被动）