2. walk back home 不加 to .我们说 go home ,同样地我们说 walk home .
3. shall we 后面要加动词原型 （没有 ing）,比如 shall we go? shall we dance?
4. 是 often tell me (not to do) that
5. hope 后面加 to比如I hope to finish my work by today

动词加s\ are?这问题不清楚.你的意思是?
我是加拿大人,前英语老师.动词加 s 还是加 are 要看前面名词（或代词）的词性：I run ...he/she/it runs ...we/they run ...the dog runs ...the dogs run ...I am ...he/she/itis ...we are ...the house is ...the books are ...