Fast, the past tense of must is not musted. Must does not have a simple past tense, in its place "Had to" is used in most cases.
Solved is the past tense of solve.
No, it is the simple past tense of to have, or part of the past perfect tense.
stidiedhas studied because this leaves a sense of present tense where as will study is future tense and had studied is past tense and to put stuied is a simlpe form of the past tense.
'Have' is of the verb 'to have'. 'is' is of the verb 'to be'.
Yes it is.
false.
The past participle of "must" is "musted."
False is an adjective and so doesn't have a past tense. Only verbs have tenses.
You can use "had to" to express obligation in the past.
The past tense of must is should have
Falsify is verb form of false. Present tense--I/we/you/they falsify, he/she/it falsifies. The past tense and past participle is falsified; the present participle is falsifying.
'Had visited' is past tense. You can see this because visit is the present tense so visited must be past tense. Also, the word 'had' is often used in the past tense.
"Must" doesn't have a past form. You can use "had to" to talk about obligation in the past.
Were. They are reading They were reading
Yes. 'was' is a past tense of 'is', and 'is' is a verb and so 'was' must be a verb.
To change the past tense and past participle of a verb, you must either change the verb back to its present tense or get rid of its suffix.
Must have. Must isn't a verb, so it doesn't have a past tense. But you can say must have, like "You must have done that!"