1、不时
... from now on 从此以后；今后 from time to time 不时；有时 get along / on (with) 进展；与……相处 ...
2、有时
... from now on 从此以后；今后 from time to time 不时；有时 get along / on (with) 进展；与……相处 ...
3、时常
...pardon me抱歉;对不起;请再说一遍from time to time时常;有时such a great idea如此好的一个主意 ...
4、偶尔
... at speed of 以……的速度 from time to time 偶尔地 in front of 在……（外部）的前面 ...
from m time to time有时;时时;不时
alarm from time to time定时报警
continue from time to time断断续续
from time to time不时
From time to time to时时地
update from time to time桌面月历壁纸
appear from time to time从表面看来;不时出现;不时出现时间
frequentlyand from time to time往往
time from time to time时常